CSIR NET JRF Chemical Sciences Live Test (Full Mock Test & Solutions)

CSIR NET Chemical Sciences Live Test: Mission JRF


Overview: Accelerate Your Preparation with Mission JRF

Cracking the CSIR-UGC NET Chemical Sciences examination to secure a Junior Research Fellowship (JRF) requires more than conceptual knowledge; it demands rigorous time management, negative marking control, and familiarity with computer-based test (CBT) interfaces.

The Mission JRF: Chemical Sciences Live Test is curated to simulate the exact standard, difficulty level, and interface of the National Testing Agency (NTA) examination. Whether revising core principles in Organic, Inorganic, and Physical Chemistry or testing analytical skills in multi-concept Part C questions, this live mock test benchmarks preparation against all-India candidates.

CSIR NET Chemical Sciences Exam Pattern & Live Test Structure

The live test follows the official NTA CSIR-UGC NET structure across three distinct sections:

SectionTotal QuestionsMax Questions to AttemptMarks per QuestionNegative MarkingTotal MarksFocus Area
Part A2015+2-0.50 (25%)30General Science, Quantitative & Reasoning
Part B4035+2-0.50 (25%)70Fundamental Chemistry (BSc/MSc standard)
Part C6025+4-1.00 (25%)100Advanced Analytical & Multi-Step Concepts
Total12075200Duration: 180 Minutes (3 Hours)
ChemistryABC.com Logo
CSIR-NET-JRF Chemical Sciences Paper Dec-2011
🎯 Universal / Generic — Negative Marking Applicable
Photo
परीक्षार्थी: अतिथि परीक्षार्थी (Guest)
ID: GUEST-TEST Login
⏱️ 180:00
Question No. 01 | Part A
Marks: +2.0, -0.5 | CSIR NET Practice
प्रश्न लोड हो रहा है...
Loading question...
📋 Question Palette
💡 Study & Learning Assistance
Question Palette Total: 0
0
Answered
0
Not Answered
0
Not Visited
0
Marked Review
📖 Test Questions & Syllabus Outline (Google Search Index & Study Reference) Total: 125 Questions / प्रश्न

This online mock test covers the following chemistry practice questions with bilingual explanations, negative marking schemes, and interactive CBT interface. Students searching for these topics can practice the complete test online with real-time timers:

  1. Identify which of the following operators is not Hermitian? CSIR NET Dec 2011 | Q21 | Quantum Chemistry / Hermitian Operators
    निम्नलिखित में से कौन-सा संकारक (operator) हर्मिटी (Hermitian) नहीं है?
  2. The term symbol for the ground state of nitrogen atom ($^7\mathrm{N}$) is: CSIR NET Dec 2011 | Q22 | Atomic Spectroscopy / Ground State Term Symbol of Nitrogen
    नाइट्रोजन परमाणु ($^7\mathrm{N}$) की मूल अवस्था (ground state) के लिए पद प्रतीक (term symbol) क्या है?
  3. $P_A$ and $P_B$ denote the populations of two energy states $E_A$ and $E_B$, and $E_A > E_B$. The correct statement when the temperature $T_1 > T_2$ is: CSIR NET Dec 2011 | Q23 | Statistical Thermodynamics / Boltzmann Distribution Law
    $P_A$ तथा $P_B$ दो ऊर्जा स्तरों $E_A$ तथा $E_B$ की समष्टियों (populations) को निरूपित करते हैं, जहाँ $E_A > E_B$ है। जब ताप $T_1 > T_2$ हो, तो सही कथन कौन-सा है?
  4. The uncertainty in the NMR frequency of a compound in liquid state (relaxation time = $1\text{ s}$) is $0.1\text{ Hz}$. The uncertainty in the frequency (in Hz) of same compound in solid state (relaxation time = $10^{-4}\text{ s}$) is: CSIR NET Dec 2011 | Q24 | Physical Spectroscopy / NMR Relaxation & Frequency Uncertainty
    द्रव अवस्था (विश्रांति काल = $1\text{ s}$) में किसी यौगिक की NMR आवृत्ति में अनिश्चितता $0.1\text{ Hz}$ है। ठोस अवस्था (विश्रांति काल = $10^{-4}\text{ s}$) में उसी यौगिक की आवृत्ति में अनिश्चितता (Hz में) क्या होगी?
  5. Which one of the following conductometric titrations will show a linear increase of the conductance with volume of the titrant added up to the break point and an almost constant conductance afterwards? CSIR NET Dec 2011 | Q25 | Electrochemistry / Conductometric Titrations
    निम्नलिखित में से कौन-सा चालकतामापी अनुमापन (conductometric titration) अंत बिंदु तक चालकता में रैखिक वृद्धि और उसके पश्चात लगभग स्थिर चालकता प्रदर्शित करेगा?
  6. Flocculation value of $\mathrm{K_2SO_4}$ is much less than that of $\mathrm{KBr}$ for Sol A. Flocculation value of $\mathrm{CaCl_2}$ is much less than that of $\mathrm{NaCl}$ for Sol B. Which of the following statements is correct? CSIR NET Dec 2011 | Q26 | Colloid & Surface Chemistry / Hardy-Schulze Rule
    सॉल A के लिए $\mathrm{K_2SO_4}$ का ऊर्णन मान (flocculation value) $\mathrm{KBr}$ की तुलना में बहुत कम है। सॉल B के लिए $\mathrm{CaCl_2}$ का ऊर्णन मान $\mathrm{NaCl}$ की तुलना में बहुत कम है। निम्नलिखित में से कौन-सा कथन सही है?
  7. For a system of constant composition, the pressure ($P$) is given by: CSIR NET Dec 2011 | Q27 | Chemical Thermodynamics / Maxwell & Fundamental Relations
    नियत संघटन वाले तंत्र के लिए, दाब ($P$) किसके द्वारा दिया जाता है?
  8. The value of $d_{111}$ in a cubic crystal is $325.6\text{ pm}$. The value of $d_{333}$ is: CSIR NET Dec 2011 | Q28 | Solid State Chemistry / Interplanar Spacing in Cubic Crystal
    घनीय क्रिस्टल (cubic crystal) में $d_{111}$ का मान $325.6\text{ pm}$ है। $d_{333}$ का मान क्या होगा?
  9. The symmetry point group of ethane in its staggered conformation is: CSIR NET Dec 2011 | Q29 | Group Theory / Staggered Ethane Symmetry Point Group
    एथेन (ethane) के सांतरित संरूपण (staggered conformation) का सममिति बिंदु समूह (point group) क्या है?
  10. For the reaction $\mathrm{C_2H_4(g) + 3O_2(g) \to 2CO_2(g) + 2H_2O(l)}$, the value of $\Delta H - \Delta U$ (in kJ) at $300\text{ K}$ and $1\text{ bar}$ is: CSIR NET Dec 2011 | Q30 | Chemical Thermodynamics / Delta H minus Delta U for Gas Reactions
    अभिक्रिया $\mathrm{C_2H_4(g) + 3O_2(g) \to 2CO_2(g) + 2H_2O(l)}$ के लिए, $300\text{ K}$ और $1\text{ bar}$ पर $\Delta H - \Delta U$ का मान (kJ में) क्या है?
  11. The sodium D lines are due to $^2P_{1/2} \to ^2S_{1/2}$ ($\Delta E_1$) and $^2P_{3/2} \to ^2S_{1/2}$ ($\Delta E_2$) transitions. The splitting due to spin-orbit coupling in the $^2P$ state of the sodium atom is: CSIR NET Dec 2011 | Q31 | Atomic Spectroscopy / Sodium D Line Spin-Orbit Splitting
    सोडियम D रेखाएं $^2P_{1/2} \to ^2S_{1/2}$ (ऊर्जा $\Delta E_1$) तथा $^2P_{3/2} \to ^2S_{1/2}$ (ऊर्जा $\Delta E_2$) संक्रमणों के कारण होती हैं। सोडियम परमाणु की $^2P$ अवस्था में चक्रण-कक्षा युग्मन (spin-orbit coupling) के कारण विपाटन क्या है?
  12. The rate constant of a unimolecular reaction was $2.66 \times 10^{-3}\text{ s}^{-1}$ and $2.2 \times 10^{-1}\text{ s}^{-1}$ at $T = 120\text{ K}$ and $360\text{ K}$ respectively. The rate constant (in $\text{s}^{-1}$ units) at $240\text{ K}$ would be: CSIR NET Dec 2011 | Q32 | Chemical Kinetics / Arrhenius Temperature Dependence
    एक एकाण्विक अभिक्रिया का वेग स्थिरांक $T = 120\text{ K}$ तथा $360\text{ K}$ पर क्रमशः $2.66 \times 10^{-3}\text{ s}^{-1}$ तथा $2.2 \times 10^{-1}\text{ s}^{-1}$ था। $240\text{ K}$ पर वेग स्थिरांक ($ ext{s}^{-1}$ इकाइयों में) क्या होगा?
  13. For a potentiometric titration, in the curve of emf ($E$) vs volume ($V$) of the titrant added, the equivalence point is indicated by: CSIR NET Dec 2011 | Q33 | Electrochemistry / Potentiometric Titration Equivalence Point
    विभवमापी अनुमापन (potentiometric titration) में, अनुमापक के जोड़े गए आयतन ($V$) के विरुद्ध विद्युत वाहक बल ($E$) के वक्र में, तुल्यता बिंदु (equivalence point) किसके द्वारा सूचित होता है?
  14. The osmotic pressure ($\pi$) of a polymer sample at different concentrations ($c$) was measured at $T\text{ (K)}$. A plot of $(\pi/c)$ versus $c$ gave a straight line with slope ($m$) and intercept ($c'$). The number average molecular weight of the polymer is ($R = \text{gas constant}$): CSIR NET Dec 2011 | Q34 | Polymer Chemistry / Osmotic Pressure & Molecular Weight
    विभिन्न सांद्रताओं ($c$) पर एक बहुलक नमूने के परासरण दाब ($\pi$) को $T\text{ (K)}$ पर मापा गया। $(\pi/c)$ बनाम $c$ का आलेख ढाल ($m$) तथा अंतःखंड ($c'$) वाली एक सीधी रेखा देता है। बहुलक का संख्या औसत अणुभार क्या है ($R = \text{गैस नियतांक}$)?
  15. The concentration of a reactant undergoing decomposition was $0.1$, $0.08$ and $0.067\text{ mol L}^{-1}$ after $1.0$, $2.0$ and $3.0\text{ hr}$ respectively. The order of the reaction is: CSIR NET Dec 2011 | Q35 | Chemical Kinetics / Reaction Order from Concentration-Time Data
    अपघटित हो रहे एक अभिकारक की सांद्रता क्रमशः $1.0$, $2.0$, और $3.0\text{ घंटे}$ बाद $0.1$, $0.08$, और $0.067\text{ mol L}^{-1}$ थी। अभिक्रिया की कोटि (order of reaction) क्या है?
  16. A particle is constrained in a one-dimensional box of length $2a$ with potential $V(x) = \infty$ for $|x| > a$ and $V(x) = 0$ for $-a \le x \le a$. The energy difference between levels $n = 3$ and $n = 2$ is: CSIR NET Dec 2011 | Q36 | Quantum Mechanics / 1D Box with Shifted Origin (-a to a)
    एक कण लंबाई $2a$ के एक-विमीय बॉक्स में सीमित है जहाँ विभव $|x| > a$ के लिए $V(x) = \infty$ तथा $-a \le x \le a$ के लिए $V(x) = 0$ है। स्तरों $n = 3$ और $n = 2$ के बीच ऊर्जा अंतर क्या है?
  17. In the $^{19}\mathrm{F}$ NMR spectrum of $\mathrm{PF_5}$, the number of signals and multiplicity, at room temperature are: CSIR NET Dec 2011 | Q37 | Inorganic Spectroscopy / 19F NMR of PF5 Molecule
    कमरे के तापमान पर $\mathrm{PF_5}$ के $^{19}\mathrm{F}$ NMR स्पेक्ट्रम में सिग्नलों की संख्या और बहुकता (multiplicity) क्या होती है?
  18. The correct statement regarding closo-$\mathrm{\{B_n H_n\}}$ species is: CSIR NET Dec 2011 | Q38 | Main Group Chemistry / Polyhedral Boranes & Wade Rules
    closo-$\mathrm{\{B_n H_n\}}$ स्पीशीज के संबंध में सही कथन कौन-सा है?
  19. Lewis acidity of $\mathrm{BCl_3}$, $\mathrm{BPh_3}$ and $\mathrm{BMe_3}$ with respect to pyridine follows the order: CSIR NET Dec 2011 | Q39 | Main Group Chemistry / Lewis Acidity of Boron Halides and Alkyls
    पिरिडीन (pyridine) के प्रति $\mathrm{BCl_3}$, $\mathrm{BPh_3}$ तथा $\mathrm{BMe_3}$ की लुईस अम्लता (Lewis acidity) का क्रम क्या है?
  20. Superoxide dismutase contains the metal ions: CSIR NET Dec 2011 | Q40 | Bioinorganic Chemistry / Superoxide Dismutase Active Metals
    सुपरऑक्साइड डिसम्यूटेज (Superoxide dismutase, Cu-Zn SOD) में कौन-से धातु आयन उपस्थित होते हैं?
  21. The number of antibonding electrons in $\mathrm{NO}$ and $\mathrm{CO}$ according to MO theory are respectively: CSIR NET Dec 2011 | Q41 | Molecular Orbital Theory / Antibonding Electrons in NO and CO
    आण्विक कक्षक सिद्धांत (MO theory) के अनुसार $\mathrm{NO}$ तथा $\mathrm{CO}$ में विपरीत-बंदी (antibonding) इलेक्ट्रॉनों की संख्या क्रमशः क्या है?
  22. The correct combination of metal, number of carbonyl ligands and the charge for a metal carbonyl complex $[\mathrm{M(CO)}_x]^z$ that satisfies the 18 electron rule is: CSIR NET Dec 2011 | Q42 | Organometallics / 18-Electron Rule in Metal Carbonyls
    18-इलेक्ट्रॉन नियम को संतुष्ट करने वाले धातु कार्बोनिल संकुल $[\mathrm{M(CO)}_x]^z$ के लिए धातु, कार्बोनिल लिगैंडों की संख्या ($x$) तथा आवेश ($z$) का सही संयोजन कौन-सा है?
  23. Among the following pairs: (1) oxygen - sulfur (2) nitrogen - phosphorus (3) phosphorus - arsenic (4) chlorine - iodine Those in which the first ionization energies differ by more than $300\text{ kJ mole}^{-1}$ are: CSIR NET Dec 2011 | Q43 | Periodic Trends / First Ionization Energy Differences
    निम्नलिखित युग्मों में से: (1) ऑक्सीजन - सल्फर (2) नाइट्रोजन - फॉस्फोरस (3) फॉस्फोरस - आर्सेनिक (4) क्लोरीन - आयोडीन वे युग्म जिनके प्रथम आयनन ऊर्जाओं में अंतर $300\text{ kJ mole}^{-1}$ से अधिक है, कौन-से हैं?
  24. The stable cyclopentadienyl complex of beryllium is: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Be η⁵-C₅H₅ η¹-C₅H₅ CSIR NET Dec 2011 | Q44 | Organometallics / Stable Cyclopentadienyl Beryllium Complexes
    बेरिलियम का स्थायी साइक्लोपेंटाडाइएनाइल संकुल (beryllocene) कौन-सा है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Be η⁵-C₅H₅ η¹-C₅H₅
  25. The reaction between $\mathrm{NH_4Br}$ and $\mathrm{Na}$ metal in liquid ammonia (solvent) results in the products: CSIR NET Dec 2011 | Q45 | Inorganic Reactions / Sodium in Liquid Ammonia with NH4Br
    द्रव अमोनिया विलायक में $\mathrm{NH_4Br}$ तथा $\mathrm{Na}$ धातु के मध्य अभिक्रिया के परिणामस्वरूप कौन-से उत्पाद प्राप्त होते हैं?
  26. The material that exhibits the highest electrical conductivity among the following sulfur-nitrogen compounds is: CSIR NET Dec 2011 | Q46 | Main Group Chemistry / Polythiazyl (SN)x Superconductor
    निम्नलिखित सल्फर-नाइट्रोजन यौगिकों में से कौन-सा पदार्थ सर्वाधिक विद्युत चालकता (electrical conductivity) प्रदर्शित करता है?
  27. Uranium fluorides co-precipitate with: CSIR NET Dec 2011 | Q47 | Nuclear Chemistry / Uranium Fluoride Co-precipitation
    यूरेनियम फ्लोराइड निम्नलिखित में से किसके साथ सह-अवक्षेपित (co-precipitate) होते हैं?
  28. The acid-base indicator (HIn) shows a colour change at pH 6.40 when 20% of it is ionized. The dissociation constant of the indicator is: CSIR NET Dec 2011 | Q48 | Equilibrium & Solutions / Acid-Base Indicator Dissociation
    एक अम्ल-क्षार सूचक (HIn) pH 6.40 पर रंग परिवर्तन प्रदर्शित करता है जब इसका 20% भाग आयनित होता है। सूचक का वियोजन स्थिरांक ($K_{In}$) क्या है?
  29. The actual magnetic moment shows a large deviation from the spin-only formula in the case of: CSIR NET Dec 2011 | Q49 | f-Block Chemistry / Sm3+ Magnetic Moment Large Deviation
    किस आयन के मामले में वास्तविक चुंबकीय आघूर्ण (actual magnetic moment) चक्रण-मात्र सूत्र (spin-only formula) से अत्यधिक विचलन प्रदर्शित करता है?
  30. The complex that absorbs light of shortest wavelength is: CSIR NET Dec 2011 | Q50 | Coordination Chemistry / Spectrochemical Series & Absorption
    निम्नलिखित में से कौन-सा संकुल न्यूनतम तरंगदैर्ध्य (shortest wavelength) के प्रकाश को अवशोषित करता है?
  31. Two $\alpha$ particles having speeds $S_1$ and $S_2$ have kinetic energies $1$ and $2\text{ MeV}$ respectively; the relationship between $S_1$ and $S_2$ is: CSIR NET Dec 2011 | Q51 | Nuclear Physics & Kinetics / Alpha Particle Velocities & Energies
    दो $\alpha$-कणों की चालें $S_1$ तथा $S_2$ हैं तथा उनकी गतिज ऊर्जाएं क्रमशः $1\text{ MeV}$ तथा $2\text{ MeV}$ हैं। $S_1$ तथा $S_2$ के मध्य सही संबंध क्या है?
  32. Green coloured $\mathrm{Ni(PPh_2Et)_2Br_2}$ has a magnetic moment of $3.20\text{ B.M.}$ The geometry and the number of isomers possible for the complex respectively, are: CSIR NET Dec 2011 | Q52 | Coordination Chemistry / Tetrahedral Ni(II) Complex Isomers
    हरे रंग के संकुल $\mathrm{Ni(PPh_2Et)_2Br_2}$ का चुंबकीय आघूर्ण $3.20\text{ B.M.}$ है। संकुल की ज्यामिति तथा इसके लिए संभव समावयवियों (isomers) की संख्या क्रमशः क्या है?
  33. The chemiluminescence method for determining $\mathrm{NO}$ in environmental samples is based on formation of $\mathrm{NO_2^*}$ (excited) which is generally generated by reacting $\mathrm{NO}$ with: CSIR NET Dec 2011 | Q53 | Environmental & Analytical / Chemiluminescence of NO with Ozone
    पर्यावरणीय नमूनों में $\mathrm{NO}$ के निर्धारण हेतु रसोसंदीप्ति (chemiluminescence) विधि उत्तेजित $\mathrm{NO_2^*}$ के निर्माण पर आधारित है, जो सामान्यतः $\mathrm{NO}$ की किसके साथ अभिक्रिया द्वारा उत्पन्न होता है?
  34. In the IR spectrum, carbonyl absorption band for the following compound appears at: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O H H CSIR NET Dec 2011 | Q54 | Organic Spectroscopy / Carbonyl IR Frequency of Lactones
    अवरक्त (IR) स्पेक्ट्रम में, निम्नलिखित द्विचक्रिय लैक्टोन (bicyclic lactone) के लिए कार्बोनिल अवशोषण बैंड किस आवृत्ति पर प्रकट होता है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O H H
  35. Among the following compounds, the formyl anion equivalent is: CSIR NET Dec 2011 | Q55 | Organic Synthesis / Umpolung & Formyl Anion Equivalents
    निम्नलिखित यौगिकों में से कौन-सा यौगिक फॉर्मिल ऋणायन तुल्यमान (formyl anion equivalent) है?
  36. In the following concerted reaction, the product is formed by a: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} H H Δ CSIR NET Dec 2011 | Q56 | Pericyclic Reactions / Electrocyclisation Stereochemistry
    निम्नलिखित सम्बद्ध (concerted) अभिक्रिया में उत्पाद का निर्माण किसके द्वारा होता है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} H H Δ
  37. A suitable reagent combination for carrying out the following conversion is: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OH OH 2-methoxypropene p-TsOH (cat.) O O Me Me CSIR NET Dec 2011 | Q57 | Organic Synthesis / Diol Protection as Acetonide
    निम्नलिखित रूपांतरण को संपन्न करने के लिए उपयुक्त अभिकर्मक संयोजन कौन-सा है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OH OH 2-methoxypropene p-TsOH (cat.) O O Me Me
  38. The IUPAC name of the following compound is: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} HC≡C O OH 1 2 3 (S) 4 5 6 CSIR NET Dec 2011 | Q58 | Nomenclature / IUPAC Naming with Chirality & Alkyne-Alkene
    दिए गए यौगिक का सही IUPAC नाम क्या है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} HC≡C O OH 1 2 3 (S) 4 5 6
  39. In the mass spectrum of dodecahedrane ($\mathrm{C_{20}H_{20}}$), approximate ratio of the peaks at $m/z$ 260 and 261 is: CSIR NET Dec 2011 | Q59 | Mass Spectrometry / Dodecahedrane Isotopic Peak Ratio
    डोडेकाहेड्रेन ($\mathrm{C_{20}H_{20}}$) के द्रव्यमान स्पेक्ट्रम में, $m/z$ 260 तथा 261 पर पीकों का अनुमानित अनुपात क्या है?
  40. The reaction given below proceeds through: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O OH I₂ / KI NaHCO₃ O O I CSIR NET Dec 2011 | Q60 | Organic Reactions / Iodolactonization Reaction Mechanism
    नीचे दी गई आयोडोलैक्टोनीकरण (iodolactonization) अभिक्रिया किसके माध्यम से संपन्न होती है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O OH I₂ / KI NaHCO₃ O O I
  41. Among the following drugs, the anticancer agent is: CSIR NET Dec 2011 | Q61 | Medicinal Chemistry / Natural Anticancer Alkaloids
    निम्नलिखित औषधियों में से कैंसर-रोधी एजेंट (anticancer agent) कौन-सा है?
  42. The reaction that involves the formation of both C-C and C-O bonds is: CSIR NET Dec 2011 | Q62 | Name Reactions / Darzens Glycidic Ester Condensation
    वह अभिक्रिया जिसमें $\mathrm{C-C}$ तथा $\mathrm{C-O}$ दोनों आबंधों का निर्माण होता है, कौन-सी है?
  43. Among A-C, the aromatic compounds are: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} (A) CH₂ (B) (C) CSIR NET Dec 2011 | Q63 | Aromaticity / Huckel 4n+2 Rule for Heterocycles & Annulenes
    A से C में से, ऐरोमैटिक यौगिक (aromatic compounds) कौन-से हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} (A) CH₂ (B) (C)
  44. In the following Markownikov addition reaction, the products A and B are: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ph Me H₂C HBr A + B Diastereomers (C* retained, new C* formed) CSIR NET Dec 2011 | Q64 | Stereochemistry / Addition of HBr to Chiral Alkenes
    दिए गए मार्कोवनीकॉफ योग अभिक्रिया में, उत्पाद A तथा B क्या हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ph Me H₂C HBr A + B Diastereomers (C* retained, new C* formed)
  45. The major product formed in the following reaction is: (3-chloroanisole + $\mathrm{NaNH_2/liq.\ NH_3}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe Cl NaNH₂ liq. NH₃ OMe NH₂ m-anisidine CSIR NET Dec 2011 | Q65 | Aromatic Substitution / Benzyne Intermediate Addition
    निम्नलिखित अभिक्रिया में निर्मित मुख्य उत्पाद कौन-सा है? (3-क्लोरोऐनिसोल + $\mathrm{NaNH_2/liq.\ NH_3}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe Cl NaNH₂ liq. NH₃ OMe NH₂ m-anisidine
  46. Among A-C, the compounds which can exhibit optical activity are: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} (A) NO₂ COOH (B) Chiral Ph H Ph Me (C) Chiral CSIR NET Dec 2011 | Q66 | Stereochemistry / Optical Activity in Allenes & Biphenyls
    यौगिकों A-C में से, कौन-से यौगिक प्रकाशिक सक्रियता (optical activity) प्रदर्शित कर सकते हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} (A) NO₂ COOH (B) Chiral Ph H Ph Me (C) Chiral
  47. The major product formed in the following reaction is: ($\alpha,\beta$-epoxy ketone + $\mathrm{LiAlH_4}$ at $-70\ ^\circ\mathrm{C}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O Ph LiAlH₄ -70 °C OH O Ph CSIR NET Dec 2011 | Q67 | Organic Reduction / Regioselective LiAlH4 Reduction
    निम्नलिखित अभिक्रिया में निर्मित मुख्य उत्पाद कौन-सा है? ($\alpha,\beta$-एपॉक्सी कीटोन + $\mathrm{LiAlH_4}$ at $-70\ ^\circ\mathrm{C}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O Ph LiAlH₄ -70 °C OH O Ph
  48. An organic compound (MF: $\mathrm{C_8H_{10}O}$) exhibited the following $^1\mathrm{H}$ NMR spectral data: $\delta\ 2.5\ (3\mathrm{H}, s)$, $3.8\ (3\mathrm{H}, s)$, $6.8\ (2\mathrm{H}, d, J = 8\text{ Hz})$, $7.2\ (2\mathrm{H}, d, J = 8\text{ Hz})\text{ ppm}$. The compound among the choices, is: CSIR NET Dec 2011 | Q68 | Organic Spectroscopy / 1H NMR Identification of C8H10O
    एक कार्बनिक यौगिक (अणुसूत्र $\mathrm{C_8H_{10}O}$) निम्नलिखित $^1\mathrm{H}$ NMR स्पेक्ट्रमी आंकड़े प्रदर्शित करता है: $\delta\ 2.5\ (3\mathrm{H}, s)$, $3.8\ (3\mathrm{H}, s)$, $6.8\ (2\mathrm{H}, d, J = 8\text{ Hz})$, $7.2\ (2\mathrm{H}, d, J = 8\text{ Hz})\text{ ppm}$। विकल्पों में से यह यौगिक कौन-सा है?
  49. With respect to electrophilic aromatic substitution, reactivity order of pyrrole, pyridine and indole is: CSIR NET Dec 2011 | Q69 | Heterocyclic Chemistry / Electrophilic Substitution Reactivity
    इलेक्ट्रॉन-स्नेही ऐरोमैटिक प्रतिस्थापन (electrophilic aromatic substitution) के प्रति पाइरोल, पिरिडीन तथा इन्डोल की क्रियाशीलता का सही क्रम क्या है?
  50. The most appropriate reagent suitable for the conversion of 2-octyne into trans-2-octene is: CSIR NET Dec 2011 | Q70 | Organic Synthesis / Alkyne Reduction to trans-Alkene (Birch)
    2-ऑक्टाइन को trans-2-ऑक्टीन में परिवर्तित करने के लिए सर्वाधिक उपयुक्त अभिकर्मक कौन-सा है?
  51. Consider a n-type semiconductor whose $E_v = 0$, $E_c = 2.0\text{ eV}$ and $E_d = 1.98\text{ eV}$. The correct statement among the following is: CSIR NET Dec 2011 | Q71 | Solid State / Fermi Level in n-type Semiconductors
    एक n-प्रकार के अर्धचालक (n-type semiconductor) पर विचार कीजिए जिसमें $E_v = 0$, $E_c = 2.0\text{ eV}$ तथा $E_d = 1.98\text{ eV}$ है। निम्नलिखित में से सही कथन कौन-सा है?
  52. Reaction of $\mathrm{Fe(CO)_5}$ with $\mathrm{OH^-}$ leads to complex A which on oxidation with $\mathrm{MnO_2}$ gives B. Compounds A and B respectively are: CSIR NET Dec 2011 | Q72 | Organometallics / Hieber Reaction of Fe(CO)5 with Base
    $\mathrm{Fe(CO)_5}$ की $\mathrm{OH^-}$ के साथ अभिक्रिया से संकुल A प्राप्त होता है, जो $\mathrm{MnO_2}$ द्वारा ऑक्सीकरण पर B देता है। यौगिक A तथा B क्रमशः क्या हैं?
  53. For the reaction $\mathrm{C(graphite) + H_2O(g) \rightleftharpoons CO(g) + H_2(g)}$, the variation of energy parameter $\Delta G^\circ$, $\Delta H^\circ$ and $T\Delta S^\circ$ of the reaction over a large temperature range is shown below. The correct identification of the curves is given by: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Energy (kJ/mol) Temperature T (K) A (ΔH°) B (ΔG°) C (TΔS°) CSIR NET Dec 2011 | Q73 | Thermodynamics / Ellingham & Thermodynamic State Functions
    अभिक्रिया $\mathrm{C(graphite) + H_2O(g) \rightleftharpoons CO(g) + H_2(g)}$ के लिए, एक विस्तृत ताप परास में ऊर्जा प्राचलों $\Delta G^\circ$, $\Delta H^\circ$ तथा $T\Delta S^\circ$ का परिवर्तन प्रदर्शित किया गया है। वक्रों A, B तथा C की सही पहचान क्या है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Energy (kJ/mol) Temperature T (K) A (ΔH°) B (ΔG°) C (TΔS°)
  54. A Sodalite cage in zeolites is: CSIR NET Dec 2011 | Q74 | Inorganic Materials / Sodalite Cage Topology in Zeolites
    जियोलाइट्स (zeolites) में सोडालाइट पिंजर (Sodalite cage) की ज्यामितीय आकृति क्या होती है?
  55. Two moles of a nonvolatile solute is dissolved in $48\text{ mol}$ of water and the resultant solution has a vapour pressure of $0.0392\text{ bar}$ at $300\text{ K}$. If the vapour pressure of pure water at $300\text{ K}$ is $0.0400\text{ bar}$, the activity coefficient of water in the solution is: CSIR NET Dec 2011 | Q75 | Thermodynamics / Solution Vapour Pressure & Activity Coefficient
    एक अवाष्पशील विलेय के दो मोल $48\text{ मोल}$ जल में घोले गए तथा प्राप्त विलयन का वाष्प दाब $300\text{ K}$ पर $0.0392\text{ bar}$ है। यदि $300\text{ K}$ पर शुद्ध जल का वाष्प दाब $0.0400\text{ bar}$ हो, तो विलयन में जल की सक्रियता (activity, $a_w$) क्या है?
  56. The final product(s) of the reaction $\mathrm{P(OR)_3 + R'X}$ is/are: CSIR NET Dec 2011 | Q76 | Organophosphorus / Michaelis-Arbuzov Rearrangement
    अभिक्रिया $\mathrm{P(OR)_3 + R'X}$ के अंतिम उत्पाद क्या हैं?
  57. $1\text{ mol}$ of $\mathrm{CO_2}$, $1\text{ mol}$ of $\mathrm{N_2}$ and $2\text{ mol}$ of $\mathrm{O_2}$ were mixed at $300\text{ K}$. The entropy of mixing is: CSIR NET Dec 2011 | Q77 | Statistical Thermodynamics / Entropy of Mixing Ideal Gases
    $1\text{ mol }\mathrm{CO_2}$, $1\text{ mol }\mathrm{N_2}$ तथा $2\text{ mol }\mathrm{O_2}$ को $300\text{ K}$ पर मिश्रित किया गया। मिश्रण की एन्ट्रॉपी (entropy of mixing, $\Delta S_{mix}$) क्या है?
  58. For the eigenstates of the hydrogen atom, which of the following relations between the expectation value of kinetic energy ($T$) and potential ($V$) holds true? CSIR NET Dec 2011 | Q78 | Quantum Mechanics / Virial Theorem for Hydrogen Atom
    हाइड्रोजन परमाणु की आइगेन-अवस्थाओं (eigenstates) के लिए, गतिज ऊर्जा के प्रत्याशा मान $\langle T \rangle$ तथा स्थितिज ऊर्जा के प्रत्याशा मान $\langle V \rangle$ के मध्य कौन-सा संबंध सत्य है?
  59. For the liquid $\rightleftharpoons$ vapour equilibrium of a substance $dP/dT$ at $1\text{ bar}$ and $400\text{ K}$ is $8 \times 10^{-3}\text{ bar K}^{-1}$. If the molar volume in the vapour form is $200\text{ L mol}^{-1}$ and the molar volume in the liquid form is negligible, the molar enthalpy of vapourisation is ($1.0\text{ bar L} = 100\text{ J}$): CSIR NET Dec 2011 | Q79 | Thermodynamics / Clapeyron-Clausius Enthalpy of Vaporisation
    किसी पदार्थ के द्रव $\rightleftharpoons$ वाष्प साम्य के लिए $1\text{ bar}$ तथा $400\text{ K}$ पर $\frac{dP}{dT} = 8 \times 10^{-3}\text{ bar K}^{-1}$ है। यदि वाष्प रूप में मोलर आयतन $200\text{ L mol}^{-1}$ हो तथा द्रव रूप में मोलर आयतन नगण्य हो, तो वाष्पीकरण की मोलर एन्थैल्पी (molar enthalpy of vaporisation) क्या होगी? ($1.0\text{ bar L} = 100\text{ J}$)
  60. The correct order of acidity among the following species is: CSIR NET Dec 2011 | Q80 | Inorganic Solution Chemistry / Acidity of Hexaaqua Metal Ions
    निम्नलिखित जलयोजित धातु आयनों में अम्लता (acidity) का सही क्रम कौन-सा है?
  61. The Langmuir adsorption isotherm is given by $\theta = \frac{Kp}{1 + Kp}$, where $p$ is the pressure of the adsorbate gas. The Langmuir adsorption isotherm for a diatomic gas $\mathrm{A_2}$ undergoing dissociative adsorption is: CSIR NET Dec 2011 | Q81 | Surface Chemistry / Dissociative Langmuir Adsorption Isotherm
    लैंगम्यूर अधिशोषण समतापी $\theta = \frac{Kp}{1 + Kp}$ द्वारा दिया जाता है। एक द्विपरमाणुक गैस $\mathrm{A_2}$ जो वियोजी अधिशोषण (dissociative adsorption) से गुजरती है, के लिए लैंगम्यूर अधिशोषण समतापी क्या होगा?
  62. The standard electrode potentials ($E^\circ$) of $\mathrm{Fe^{3+}/Fe^{2+}}$ and $\mathrm{Fe^{2+}/Fe}$ electrodes are $+0.77\text{ V}$ and $-0.44\text{ V}$ respectively at $300\text{ K}$. The $E^\circ$ of $\mathrm{Fe^{3+}/Fe}$ electrode at the same temperature is: CSIR NET Dec 2011 | Q82 | Electrochemistry / Latimer & Frost Standard Reduction Potentials
    मानक इलेक्ट्रोड विभव ($E^\circ$) $\mathrm{Fe^{3+}/Fe^{2+}}$ तथा $\mathrm{Fe^{2+}/Fe}$ इलेक्ट्रोडों के लिए $300\text{ K}$ पर क्रमशः $+0.77\text{ V}$ तथा $-0.44\text{ V}$ हैं। उसी ताप पर $\mathrm{Fe^{3+}/Fe}$ इलेक्ट्रोड का $E^\circ$ क्या होगा?
  63. Which of the following is true for the radial part of the hydrogen atom wavefunctions $R_{nl}(r)$ ($n$ principal quantum number) and the nodes associated with them? CSIR NET Dec 2011 | Q83 | Quantum Chemistry / Radial Wavefunctions & Nodes in H Atom
    हाइड्रोजन परमाणु के त्रिज्यीय तरंगफलन $R_{nl}(r)$ ($n$ मुख्य क्वांटम संख्या) तथा उनसे जुड़े नोडों (nodes) के लिए निम्नलिखित में से कौन-सा कथन सत्य है?
  64. For non-degenerate perturbation theory for ground state, with $E_0^{(0)}$ as zeroth order energy, $E_0^{(1)}$ as the first-order perturbation correction and $E_0$ as the exact energy, which of the following is true? CSIR NET Dec 2011 | Q84 | Quantum Mechanics / Rayleigh-Schrodinger Perturbation Bounds
    मूल अवस्था के लिए अनापभ्रष्ट विक्षोभ सिद्धांत (non-degenerate perturbation theory) में, जहाँ $E_0^{(0)}$ शून्य-कोटि ऊर्जा है, $E_0^{(1)}$ प्रथम-कोटि विक्षोभ संशोधन है, तथा $E_0$ यथार्थ (exact) ऊर्जा है, निम्नलिखित में से कौन-सा कथन सत्य है?
  65. Observe the following electronic transitions of a diatomic molecule: (A) $^1\Sigma_g^+ \to ^3\Sigma_g^+$ (B) $^1\Sigma_u^+ \to ^1\Sigma_g^+$ (C) $^1\Delta_u \to ^1\Sigma_g^+$ (D) $^1\Pi_g \to ^1\Sigma_u^+$ The allowed transitions are: CSIR NET Dec 2011 | Q85 | Molecular Spectroscopy / Electronic Selection Rules in Diatomics
    एक द्विपरमाणुक अणु के निम्नलिखित इलेक्ट्रॉनिक संक्रमणों पर विचार कीजिए: (A) $^1\Sigma_g^+ \to ^3\Sigma_g^+$ (B) $^1\Sigma_u^+ \to ^1\Sigma_g^+$ (C) $^1\Delta_u \to ^1\Sigma_g^+$ (D) $^1\Pi_g \to ^1\Sigma_u^+$ अनुमत संक्रमण (allowed transitions) कौन-से हैं?
  66. An excited triplet state wave function of hydrogen molecule with the electronic configuration $\sigma_g^1 \sigma_u^1$ has the following space part: CSIR NET Dec 2011 | Q86 | Quantum Chemistry / Triplet Excited State Spatial Wavefunction
    इलेक्ट्रॉनिक विन्यास $\sigma_g^1 \sigma_u^1$ वाले हाइड्रोजन अणु की उत्तेजित त्रिक अवस्था (excited triplet state) के तरंगफलन का स्थानिक भाग (space part) क्या है?
  67. The NMR spectrum of $\mathrm{AX_3}$ exhibits lines at $\delta = 2.1$ and $2.3\text{ ppm}$ (for X type protons) and $\delta = 4.1, 4.3, 4.5$ and $4.7\text{ ppm}$ (for A type protons), measured from TMS with an instrument operating at $100\text{ MHz}$. The chemical shift (in ppm) of A and X protons and coupling constant (in Hz) are respectively: CSIR NET Dec 2011 | Q87 | Physical Spectroscopy / AX3 Spin-Spin Coupling Constant
    $\mathrm{AX_3}$ निकाय का NMR स्पेक्ट्रम $100\text{ MHz}$ पर प्रचालित स्पेक्ट्रोमीटर में X प्रकार के प्रोटॉनों के लिए $\delta = 2.1$ तथा $2.3\text{ ppm}$ पर तथा A प्रकार के प्रोटॉनों के लिए $\delta = 4.1, 4.3, 4.5$ तथा $4.7\text{ ppm}$ पर रेखाएं प्रदर्शित करता है। A तथा X प्रोटॉनों के रासायनिक विस्थापन (ppm में) तथा युग्मन स्थिरांक (Hz में) क्रमशः क्या हैं?
  68. The character table of the $C_{2v}$ point group is given. The two functions $\phi_1 = p_1 + 2p_2 + 2p_3 + p_4$ and $\phi_2 = 2p_1 - p_2 - p_3 + 2p_4$ (where $p_k$ is the p-orbital on the $k$-th atom of cis-butadiene and $\sigma_v$ is the molecular plane) belong to: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} C₂ᵥ E C₂(z) σᵥ(xz) σᵥ'(yz) A₁1111 A₂11-1-1 B₁1-11-1 B₂1-1-11 CSIR NET Dec 2011 | Q88 | Group Theory / Character Table of C2v Point Group
    $C_{2v}$ बिंदु समूह की कैरेक्टर टेबल के अनुसार, दो फलन $\phi_1 = p_1 + 2p_2 + 2p_3 + p_4$ तथा $\phi_2 = 2p_1 - p_2 - p_3 + 2p_4$ (जहाँ $p_k$ cis-ब्यूटाडाईन के $k$-वें परमाणु पर $p$-कक्षक है तथा $\sigma_v$ आण्विक तल है) किस सममिति निरूपण से संबंधित हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} C₂ᵥ E C₂(z) σᵥ(xz) σᵥ'(yz) A₁1111 A₂11-1-1 B₁1-11-1 B₂1-1-11
  69. If $\theta_r$ denotes the characteristic temperature of rotation, then the magnitude of $\frac{[\theta_r(\mathrm{H_2}) \cdot \theta_r(\mathrm{D_2})]}{[\theta_r(\mathrm{HD})]^2}$ (assume the bond lengths to be the same for all the molecules) is: CSIR NET Dec 2011 | Q89 | Statistical Thermodynamics / Rotational Partition Functions
    यदि $\theta_r$ घूर्णन के अभिलाक्षणिक ताप (characteristic temperature of rotation) को निरूपित करता है, तो समान आबंध लंबाई मानते हुए $\frac{\theta_r(\mathrm{H_2}) \cdot \theta_r(\mathrm{D_2})}{[\theta_r(\mathrm{HD})]^2}$ का परिमाण क्या होगा?
  70. The overall reaction for the passage of $1.0\text{ faraday}$ of charge in the following cell $\mathrm{Ag(s) - AgCl(s) | KCl(a_1) | KCl(a_2) | AgCl(s) - Ag(s)}$ is given by ($t$ denotes the transport numbers): CSIR NET Dec 2011 | Q90 | Electrochemistry / Concentration Cells & Transport Numbers
    सेल $\mathrm{Ag(s) - AgCl(s) | KCl(a_1) | KCl(a_2) | AgCl(s) - Ag(s)}$ में $1.0\text{ फैराडे}$ आवेश के प्रवाह के लिए समग्र अभिक्रिया क्या है? ($t$ परिवहन संख्या को निरूपित करता है)
  71. A system consisting of 4 identical and distinguishable particles, each possessing three available states of 1, 2 and 3 units, has 10 units of energy. The number of ways, $W$, in which these conditions are satisfied is: CSIR NET Dec 2011 | Q91 | Statistical Mechanics / Microstates & Energy Distribution
    4 सर्वसम तथा विभेद्य कणों (identical and distinguishable particles) का एक तंत्र, जिसमें प्रत्येक कण के लिए $1, 2$ तथा $3\text{ इकाइयों}$ की तीन अवस्थाएं उपलब्ध हैं, की कुल ऊर्जा $10\text{ इकाइयां}$ है। वह तरीकों की संख्या ($W$) जिसमें ये शर्तें पूरी होती हैं, क्या है?
  72. The molar conductivities at infinite dilution $\Lambda_m^\circ$ for $\mathrm{Na_2SO_4}$, $\mathrm{K_2SO_4}$, $\mathrm{KCl}$, $\mathrm{HCl}$ and $\mathrm{HCOONa}$ at $300\text{ K}$ are $260$, $308$, $150$, $426$ and $105\text{ S cm}^2\text{ mol}^{-1}$ respectively. Hence $\Lambda_m^\circ$ for formic acid in the same unit and at the same temperature is: CSIR NET Dec 2011 | Q92 | Electrochemistry / Kohlrausch Law of Independent Migration
    $300\text{ K}$ पर $\mathrm{Na_2SO_4}$, $\mathrm{K_2SO_4}$, $\mathrm{KCl}$, $\mathrm{HCl}$ तथा $\mathrm{HCOONa}$ के लिए अनंत तनुता पर मोलर चालकताएं ($\Lambda_m^\circ$) क्रमशः $260$, $308$, $150$, $426$ तथा $105\text{ S cm}^2\text{ mol}^{-1}$ हैं। उसी ताप पर फॉर्मिक अम्ल ($\mathrm{HCOOH}$) के लिए $\Lambda_m^\circ$ का मान क्या होगा?
  73. If the displacement vectors of all atoms in cis-butadiene are taken as the basis vectors the characters of the reducible representation of $E, C_2, \sigma_v\text{(molecular plane)}$ and $\sigma_v'$ are: CSIR NET Dec 2011 | Q93 | Group Theory / Reducible Representation for Vibrational Modes
    यदि cis-ब्यूटाडाईन के सभी परमाणुओं के विस्थापन सदिशों (displacement vectors) को आधार सदिश (basis vectors) के रूप में लिया जाए, तो $E, C_2, \sigma_v\text{(आण्विक तल)}$ तथा $\sigma_v'$ के समानयनीय निरूपण (reducible representation) के कैरेक्टर क्या होंगे?
  74. In least square fitting of a data set $\{X_i, Y_i\}$ to the equation $Y = A X$, the regression coefficient ($A$) is estimated by: CSIR NET Dec 2011 | Q94 | Data Analysis / Linear Least Squares Regression Coefficient
    समीकरण $Y = A X$ के लिए डेटा समुच्चय $\{X_i, Y_i\}$ के न्यूनतम वर्ग आसंजन (least squares fitting) में, समाश्रयण गुणांक (regression coefficient, $A$) का आकलन किसके द्वारा किया जाता है?
  75. At any temperature for the following reaction (D and T are deuterium and tritium respectively), correct statement is: (A) $\mathrm{HCl + F \to HF + Cl}$ (B) $\mathrm{DCl + F \to DF + Cl}$ (C) $\mathrm{TCl + F \to TF + Cl}$ CSIR NET Dec 2011 | Q95 | Chemical Kinetics / Kinetic Isotope Effect & Zero Point Energy
    किसी भी ताप पर निम्नलिखित अभिक्रियाओं के लिए (जहाँ D तथा T क्रमशः ड्यूटीरियम व ट्राइटियम हैं): (A) $\mathrm{HCl + F \to HF + Cl}$ (B) $\mathrm{DCl + F \to DF + Cl}$ (C) $\mathrm{TCl + F \to TF + Cl}$ सही कथन कौन-सा है?
  76. An example of a relaxation method of measuring rates is: CSIR NET Dec 2011 | Q96 | Chemical Kinetics / Relaxation Kinetics & T-jump Methods
    तीव्र अभिक्रियाओं के वेग मापने की विश्रांति विधि (relaxation method) का एक उदाहरण कौन-सा है?
  77. The overall rate of the following complex reaction: $2\mathrm{A} \xrightleftharpoons[K_1]{} \mathrm{A_2}$ (fast equilibrium) $\mathrm{A + B} \xrightleftharpoons[K_2]{} \mathrm{C}$ (fast equilibrium) $\mathrm{A_2 + C} \xrightarrow{k_3} \mathrm{P + 2A}$ (slow) by steady state approximation would be: CSIR NET Dec 2011 | Q97 | Chemical Kinetics / Steady-State Approximation for Complex Reactions
    निम्नलिखित जटिल अभिक्रिया के लिए: $2\mathrm{A} \xrightleftharpoons[K_1]{} \mathrm{A_2}$ (तीव्र साम्य) $\mathrm{A + B} \xrightleftharpoons[K_2]{} \mathrm{C}$ (तीव्र साम्य) $\mathrm{A_2 + C} \xrightarrow{k_3} \mathrm{P + 2A}$ (धीमा पद) अपरिवर्ती अवस्था सन्निकटन (steady state approximation) द्वारा समग्र अभिक्रिया का वेग क्या होगा?
  78. The vibrational energy levels, $v = 0$ and $v = 1$ of a diatomic molecule are separated by $2143\text{ cm}^{-1}$. Its anharmonicity ($\omega_e x_e$) is $14\text{ cm}^{-1}$. The values of $\omega_e$ (in $\text{cm}^{-1}$) and first overtone ($\text{cm}^{-1}$) of this molecule are respectively: CSIR NET Dec 2011 | Q98 | Molecular Spectroscopy / Anharmonicity & Vibrational Overtones
    एक द्विपरमाणुक अणु के कंपन ऊर्जा स्तर $v = 0$ तथा $v = 1$ $2143\text{ cm}^{-1}$ द्वारा पृथक हैं। इसकी अनहार्मोनिकता ($\omega_e x_e$) $14\text{ cm}^{-1}$ है। इस अणु के लिए $\omega_e$ तथा प्रथम अधिस्वरक (first overtone) के मान ($\text{cm}^{-1}$ में) क्रमशः क्या हैं?
  79. The addition polymerization of M (monomer) involves initiation by initiator I. The rate constant for free radical formation is $2 \times 10^{-3}\text{ s}^{-1}$. The initial concentration of initiator is $10^{-3}\text{ mol dm}^{-3}$. The overall rate of the reaction is $4 \times 10^{-3}\text{ mol dm}^{-3}\text{ s}^{-1}$. Assuming steady state approximation for free radical, the kinetic chain length is: CSIR NET Dec 2011 | Q99 | Polymer Chemistry / Free Radical Polymerization Chain Length
    एकलक M के मुक्त मूलक योगात्मक बहुलकीकरण में मुक्त मूलक निर्माण का वेग स्थिरांक $2 \times 10^{-3}\text{ s}^{-1}$ है। प्रारंभक की प्रारंभिक सांद्रता $10^{-3}\text{ mol dm}^{-3}$ है। समग्र अभिक्रिया का वेग $4 \times 10^{-3}\text{ mol dm}^{-3}\text{ s}^{-1}$ है। मुक्त मूलक के लिए अपरिवर्ती अवस्था सन्निकटन मानते हुए गतिज श्रृंखला लंबाई (kinetic chain length, $\nu$) क्या होगी?
  80. The electronic spectrum of $[\mathrm{CrF_6}]^{3-}$ shows three bands at $14,900\text{ cm}^{-1}$, $22,400\text{ cm}^{-1}$ and $34,800\text{ cm}^{-1}$. The value of $\Delta_0$ in this case is: CSIR NET Dec 2011 | Q100 | Electronic Spectroscopy / d-d Transitions in Octahedral Cr(III)
    $[\mathrm{CrF_6}]^{3-}$ का इलेक्ट्रॉनिक स्पेक्ट्रम $14,900\text{ cm}^{-1}$, $22,400\text{ cm}^{-1}$ तथा $34,800\text{ cm}^{-1}$ पर तीन अवशोषण बैंड प्रदर्शित करता है। इस संकुल के लिए $\Delta_0$ (अष्टफलकीय क्रिस्टल क्षेत्र विपाटन ऊर्जा) का मान क्या है?
  81. Among the following pairs, those in which both species have similar structures are: (A) $\mathrm{N_3^-}$, $\mathrm{XeF_2}$ (B) $[\mathrm{ICl_4}]^-$, $[\mathrm{PtCl_4}]^{2-}$ (C) $[\mathrm{ClF_2}]^+$, $[\mathrm{ICl_2}]^-$ (D) $\mathrm{XeO_3}$, $\mathrm{SO_3}$ CSIR NET Dec 2011 | Q101 | Inorganic Chemistry / Iso-structural Molecular Pairs
    निम्नलिखित युग्मों में से, वे कौन-से युग्म हैं जिनमें दोनों स्पीशीज की संरचनाएं समान (iso-structural) हैं? (A) $\mathrm{N_3^-}$, $\mathrm{XeF_2}$ (B) $[\mathrm{ICl_4}]^-$, $[\mathrm{PtCl_4}]^{2-}$ (C) $[\mathrm{ClF_2}]^+$, $[\mathrm{ICl_2}]^-$ (D) $\mathrm{XeO_3}$, $\mathrm{SO_3}$
  82. The number of metal-metal bonds in the dimers, $[\mathrm{CpFe(CO)(NO)}]_2$ and $[\mathrm{CpMo(CO)}_3]_2$ respectively, are: CSIR NET Dec 2011 | Q102 | Organometallics / Metal-Metal Bonds in Dinuclear Carbonyls
    डाइमर संकुलों $[\mathrm{CpFe(CO)(NO)}]_2$ तथा $[\mathrm{CpMo(CO)}_3]_2$ में धातु-धातु (M-M) आबंधों की संख्या क्रमशः क्या है?
  83. The reduction of nitrogen to ammonia, carried out by the enzyme nitrogenase, needs: CSIR NET Dec 2011 | Q103 | Bioinorganic Chemistry / Nitrogenase Nitrogen Fixation Stoichiometry
    नाइट्रोजिनेज (nitrogenase) एंजाइम द्वारा नाइट्रोजन का अमोनिया में अपचयन करने के लिए कितने इलेक्ट्रॉनों की आवश्यकता होती है?
  84. In the titration of $50\text{ mL}$ of $0.1\text{ M HCl}$ with $0.1\text{ M NaOH}$ using methyl orange as an indicator, the end point (color change) occurs as pH reaches $4.0$. The titration error is: CSIR NET Dec 2011 | Q104 | Analytical Chemistry / Acid-Base Indicator Titration Error
    $0.1\text{ M HCl}$ के $50\text{ mL}$ का $0.1\text{ M NaOH}$ के साथ मेथिल ऑरेंज सूचक का उपयोग करके अनुमापन में, अंत बिंदु (रंग परिवर्तन) तब आता है जब pH $4.0$ हो जाती है। अनुमापन त्रुटि (titration error) क्या है?
  85. The styx code of $\mathrm{B_4H_{10}}$ is: CSIR NET Dec 2011 | Q105 | Inorganic Boranes / Styx Number Code for Tetraborane B4H10
    टेट्राबोरेन $\mathrm{B_4H_{10}}$ का styx कोड क्या है?
  86. Match list I (compounds) with list II (structures), and select the correct answer using the codes given below: List-I: (A) $\mathrm{XeO_4}$ (B) $\mathrm{BrF_4^-}$ (C) $\mathrm{SeCl_4}$ List-II: (i) square planar (ii) tetrahedral (iii) distorted tetrahedral (see-saw) CSIR NET Dec 2011 | Q106 | Inorganic Stereochemistry / VSEPR Structures of Noble Gas & Halides
    सूची-I (यौगिक) को सूची-II (संरचनाएं) के साथ सुमेलित कीजिए तथा नीचे दिए गए कूट का उपयोग करके सही उत्तर चुनिए: सूची-I: (A) $\mathrm{XeO_4}$ (B) $\mathrm{BrF_4^-}$ (C) $\mathrm{SeCl_4}$ सूची-II: (i) वर्ग समतलीय (square planar) (ii) चतुष्फलकीय (tetrahedral) (iii) विकृत चतुष्फलकीय (distorted tetrahedral / see-saw)
  87. In the *trans*-$[\mathrm{PtCl_2L(CO)}]$ complex, the $\mathrm{CO}$ stretching frequency for $\mathrm{L = NH_3, pyridine, NMe_3}$ decreases in the order: CSIR NET Dec 2011 | Q107 | Inorganic Spectroscopy / Trans-influence on CO Stretching in Pt(II)
    संकुल *trans*-$[\mathrm{PtCl_2L(CO)}]$ में, $\mathrm{L = NH_3, pyridine, NMe_3}$ के लिए $\mathrm{CO}$ तनन आवृत्ति ($\nu_{CO}$) के घटने का सही क्रम क्या है?
  88. For the nuclear reactions: (A) $^8_4\mathrm{Be} \to 2\ ^4_2\mathrm{He}$ (B) $^{80}_{36}\mathrm{Kr} \to 2\ ^{40}_{18}\mathrm{Ar}$ (Given masses: $^8\mathrm{Be} = 8.005300$, $^4\mathrm{He} = 4.002603$ and $^{80}\mathrm{Kr} = 79.81638$, $^{40}\mathrm{Ar} = 39.96238$) The correct statement is: CSIR NET Dec 2011 | Q108 | Nuclear Chemistry / Spontaneous Fission Q-value Energetics
    निम्नलिखित नाभिकीय अभिक्रियाओं के लिए: (A) $^8_4\mathrm{Be} \to 2\ ^4_2\mathrm{He}$ (B) $^{80}_{36}\mathrm{Kr} \to 2\ ^{40}_{18}\mathrm{Ar}$ (दिए गए द्रव्यमान: $^8\mathrm{Be} = 8.005300$, $^4\mathrm{He} = 4.002603$ तथा $^{80}\mathrm{Kr} = 79.81638$, $^{40}\mathrm{Ar} = 39.96238\text{ amu}$) सही कथन कौन-सा है?
  89. A metal ion that replace manganese (II) ion in mangano-proteins without changing its function, is: CSIR NET Dec 2011 | Q109 | Bioinorganic Chemistry / Isomorphous Replacement for Manganese
    वह धातु आयन जो मैंगनीज-प्रोटीनों (mangano-proteins) में उनके कार्य को बदले बिना मैंगनीज(II) आयन को प्रतिस्थापित कर सकता है, कौन-सा है?
  90. In $^{57}\mathrm{Fe^*}$ Mössbauer experiment, source of $14.4\text{ keV}$ (equivalent to $3.48 \times 10^{12}\text{ MHz}$) is moved towards absorber at a velocity of $2.2\text{ mm s}^{-1}$. The shift in frequency of the source for this sample is: CSIR NET Dec 2011 | Q110 | Mossbauer Spectroscopy / Doppler Velocity Shift in 57Fe
    $^{57}\mathrm{Fe^*}$ मॉसबाउर प्रयोग में, $14.4\text{ keV}$ ($3.48 \times 10^{12}\text{ MHz}$ के तुल्य) के स्रोत को अवशोषक की ओर $2.2\text{ mm s}^{-1}$ के वेग से चलाया जाता है। इस नमूने के लिए स्रोत की आवृत्ति में विस्थापन (shift in frequency, $\Delta \nu$) क्या है?
  91. Bayer's process involves: CSIR NET Dec 2011 | Q111 | Industrial & Inorganic / Bayer Process for Boro-hydride Synthesis
    बायर प्रक्रम (Bayer's process) में क्या शामिल है?
  92. A true statement about base hydrolysis of $[\mathrm{Co(NH_3)_5Cl}]^{2+}$ is: CSIR NET Dec 2011 | Q112 | Coordination Mechanisms / Base Hydrolysis & Conjugate Base Mechanism
    $[\mathrm{Co(NH_3)_5Cl}]^{2+}$ के क्षारीय जल-अपघटन (base hydrolysis) के संबंध में सत्य कथन कौन-सा है?
  93. The catalyst involved in carrying out the metathesis of 1-butene to give ethylene and 3-hexene is: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ru PCy₃ PCy₃ Cl Cl =CH-Ph CSIR NET Dec 2011 | Q113 | Organometallic Catalysis / Olefin Metathesis Grubbs Catalyst
    1-ब्यूटीन के ओलेफिन मेटाथेसिस (metathesis) द्वारा एथिलीन तथा 3-हेक्सीन प्राप्त करने में प्रयुक्त उत्प्रेरक कौन-सा है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ru PCy₃ PCy₃ Cl Cl =CH-Ph
  94. The correct order of d-orbital splitting in a trigonal bipyramidal geometry is: CSIR NET Dec 2011 | Q114 | Crystal Field Theory / d-Orbital Splitting in Trigonal Bipyramidal
    त्रिकोणीय द्विपिरामिडी (trigonal bipyramidal, TBP) ज्यामिति में $d$-कक्षकों के विपाटन का सही ऊर्जा क्रम क्या है?
  95. For the following outer sphere electron transfer reactions: $[\mathrm{Co(NH_3)_6}]^{2+} + [\mathrm{Co^*(NH_3)_6}]^{3+} \to [\mathrm{Co(NH_3)_6}]^{3+} + [\mathrm{Co^*(NH_3)_6}]^{2+}$ ($k = 10^{-6}\text{ M}^{-1}\text{ s}^{-1}$) $[\mathrm{Ru(NH_3)_6}]^{2+} + [\mathrm{Ru^*(NH_3)_6}]^{3+} \to [\mathrm{Ru(NH_3)_6}]^{3+} + [\mathrm{Ru^*(NH_3)_6}]^{2+}$ ($k = 8.2 \times 10^2\text{ M}^{-1}\text{ s}^{-1}$) The difference in the rate constants is due to: CSIR NET Dec 2011 | Q115 | Inorganic Reaction Mechanisms / Outer-Sphere Electron Transfer Rates
    निम्नलिखित बाह्य-गोलीय इलेक्ट्रॉन स्थानांतरण (outer sphere electron transfer) अभिक्रियाओं के लिए: $[\mathrm{Co(NH_3)_6}]^{2+} + [\mathrm{Co^*(NH_3)_6}]^{3+} \to [\mathrm{Co(NH_3)_6}]^{3+} + [\mathrm{Co^*(NH_3)_6}]^{2+}$ ($k = 10^{-6}\text{ M}^{-1}\text{ s}^{-1}$) $[\mathrm{Ru(NH_3)_6}]^{2+} + [\mathrm{Ru^*(NH_3)_6}]^{3+} \to [\mathrm{Ru(NH_3)_6}]^{3+} + [\mathrm{Ru^*(NH_3)_6}]^{2+}$ ($k = 8.2 \times 10^2\text{ M}^{-1}\text{ s}^{-1}$) वेग स्थिरांकों में इस विशाल अंतर का कारण क्या है?
  96. The greater stability of $[(\mathrm{CH_3})_3\mathrm{C-CH_2-}]_4\mathrm{Ti}$ (A) compared to that of $[(\mathrm{CH_3})_2\mathrm{CH-CH_2-}]_4\mathrm{Ti}$ (B) is due to: CSIR NET Dec 2011 | Q116 | Organometallics / Thermal Stability & Beta-Hydride Elimination
    $[(\mathrm{CH_3})_3\mathrm{C-CH_2-}]_4\mathrm{Ti}$ (A, टेट्रा-नियोपेंटिल टाइटेनियम) का $[(\mathrm{CH_3})_2\mathrm{CH-CH_2-}]_4\mathrm{Ti}$ (B, टेट्रा-आइसोब्यूटिल टाइटेनियम) की तुलना में अधिक ऊष्मीय स्थायित्व किस कारण से है?
  97. The coordination number and geometry of cerium in $[\mathrm{Ce(NO_3)_6}]^{2-}$ are respectively: CSIR NET Dec 2011 | Q117 | f-Block Chemistry / Cerium(IV) Nitrato Complex Coordination Number
    संकुल $[\mathrm{Ce(NO_3)_6}]^{2-}$ में सीरियम की उपसहसंयोजन संख्या (coordination number) तथा ज्यामिति क्रमशः क्या हैं?
  98. A compound A having the composition $\mathrm{FeC_9H_8O_3}$ shows one signal at $2.5\text{ ppm}$ and another one around $5.0\text{ ppm}$ in its $^1\mathrm{H}$ NMR spectrum. The IR spectrum of this compound shows two bands around $2000\text{ cm}^{-1}$ and $1680\text{ cm}^{-1}$. The compound follows the 18 electron rule. Of the following statements for A, the correct one is/are: CSIR NET Dec 2011 | Q118 | Organometallics / Cyclopentadienyl Iron Acyl Complex 18e- Rule
    संघटन $\mathrm{FeC_9H_8O_3}$ युक्त एक यौगिक A अपने $^1\mathrm{H}$ NMR स्पेक्ट्रम में $2.5\text{ ppm}$ पर एक सिग्नल तथा $5.0\text{ ppm}$ के पास दूसरा सिग्नल प्रदर्शित करता है। इसका IR स्पेक्ट्रम लगभग $2000\text{ cm}^{-1}$ तथा $1680\text{ cm}^{-1}$ पर दो बैंड प्रदर्शित करता है। यह यौगिक 18-इलेक्ट्रॉन नियम का पालन करता है। यौगिक A के लिए सही कथन कौन-सा/से है/हैं? (A) इसमें $\eta^5\text{-Cp}$ समूह उपस्थित है। (B) इसमें टर्मिनल CO लिगैंड उपस्थित है। (C) इसमें $\mathrm{-COCH_3}$ (एसिल) लिगैंड उपस्थित है। (D) इसमें $\mathrm{Fe-H}$ आबंध उपस्थित है।
  99. In bacterial rubredoxin, the number of iron atoms, sulfur bridges and cysteine ligands are: CSIR NET Dec 2011 | Q119 | Bioinorganic Chemistry / Bacterial Rubredoxin Fe-S Center
    जीवाण्विक रुब्रेडोक्सिन (bacterial rubredoxin) में आयरन परमाणुओं, सल्फर सेतुओं (sulfur bridges) तथा सिस्टीन लिगैंडों की संख्या क्रमशः क्या होती है?
  100. In the following reaction, the product formed and the mechanism involved are: (2-chloropyridine + $\mathrm{NaOEt/EtOH,\ \Delta}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} N Cl NaOEt EtOH, Δ N OEt SNAr Addition-Elimination CSIR NET Dec 2011 | Q120 | Heterocyclic Chemistry / Pyridine Nucleophilic Aromatic Substitution
    निम्नलिखित अभिक्रिया में निर्मित उत्पाद तथा इसमें सम्मिलित क्रियाविधि क्या है? (2-क्लोरोपिरिडीन + $\mathrm{NaOEt/EtOH,\ \Delta}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} N Cl NaOEt EtOH, Δ N OEt SNAr Addition-Elimination
  101. An optically active compound enriched with R-enantiomer (60% ee) exhibited $[\alpha]_D = +90^\circ$. If the $[\alpha]_D$ value of the sample is $-135^\circ$, the ratio of R and S enantiomers would be: CSIR NET Dec 2011 | Q121 | Stereochemistry / Enantiomeric Excess & Optical Rotation
    R-प्रतिबिंबरूप से समृद्ध (60% ee) एक प्रकाशिक सक्रिय यौगिक का विशिष्ट घूर्णन $[\alpha]_D = +90^\circ$ है। यदि किसी अज्ञात नमूने का $[\alpha]_D$ मान $-135^\circ$ हो, तो उस नमूने में R तथा S प्रतिबिंबरूपों का अनुपात क्या होगा?
  102. Match the amino acids with their structures: (i) Indole side chain (ii) Imidazole side chain (iii) Hydroxymethyl ($-CH_2OH$) side chain Amino acids: (A) tryptophan (B) histidine (C) asparagine (D) serine (E) glutamic acid .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} NH (i) Trp NH N (ii) His OH (iii) Ser CSIR NET Dec 2011 | Q122 | Bio-organic Chemistry / Structures of Essential Amino Acids
    अमीनो अम्लों को उनकी रासायनिक पार्श्व-श्रृंखला संरचनाओं के साथ सुमेलित कीजिए: (i) इंडोल पार्श्व-श्रृंखला (ii) इमिडाज़ोल पार्श्व-श्रृंखला (iii) हाइड्रोक्सीमेथिल ($-CH_2OH$) पार्श्व-श्रृंखला अमीनो अम्ल: (A) ट्रिप्टोफैन (tryptophan) (B) हिस्टिडीन (histidine) (C) एस्पैराजीन (asparagine) (D) सेरीन (serine) (E) ग्लूटामिक एसिड (glutamic acid) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} NH (i) Trp NH N (ii) His OH (iii) Ser
  103. Statement I: $\mathrm{U(VI)}$ is more stable than $\mathrm{Nd(VI)}$. Statement II: The valence electrons in $\mathrm{U}$ are in $5f, 6d$ and $7s$ orbitals. CSIR NET Dec 2011 | Q123 | f-Block Chemistry / Actinide vs Lanthanide Oxidation State Stability
    कथन I: $\mathrm{U(VI)}$ $\mathrm{Nd(VI)}$ की तुलना में अधिक स्थायी है। कथन II: यूरेनियम में संयोजी इलेक्ट्रॉन $5f, 6d$ तथा $7s$ कक्षकों में उपस्थित होते हैं।
  104. The major products A and B in the following reaction sequence are: $\mathrm{Ar-CHO} \xrightarrow[2.\text{ excess }n\text{-BuLi}]{1.\ \mathrm{CBr_4, PPh_3}} \mathbf{A} \xrightarrow[\mathrm{CuSO_4,\text{ Na ascorbate}}]{\mathrm{Ph-N_3}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ar-CHO 1. CBr₄, PPh₃ 2. n-BuLi Ar-C≡CH (A) Ph-N₃ Cu(I) cat. N N N Ph Ar (B) CSIR NET Dec 2011 | Q124 | Organic Synthesis / Corey-Fuchs Reaction & Click Chemistry
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? $\mathrm{Ar-CHO} \xrightarrow[2.\text{ excess }n\text{-BuLi}]{1.\ \mathrm{CBr_4, PPh_3}} \mathbf{A} \xrightarrow[\mathrm{CuSO_4,\text{ Na ascorbate}}]{\mathrm{Ph-N_3}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ar-CHO 1. CBr₄, PPh₃ 2. n-BuLi Ar-C≡CH (A) Ph-N₃ Cu(I) cat. N N N Ph Ar (B)
  105. The major products A and B in the following reaction sequence are: CSIR NET Dec 2011 | Q125 | Pericyclic Reactions / Electrocyclic & Sigmatropic Cascades
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं?
  106. An organic compound having molecular formula $\mathrm{C_{15}H_{14}O}$ exhibited the following $^1\mathrm{H}$ and $^{13}\mathrm{C}$ NMR spectral data: $^1\mathrm{H}\text{ NMR}: \delta\ 2.4\ (s), 7.2\ (d, J = 8\text{ Hz}), 7.7\ (d, J = 8\text{ Hz})$ $^{13}\mathrm{C}\text{ NMR}: \delta\ 21.0, 129.0, 130.0, 136.0, 141.0, 190.0$ Among the choices, the compound is: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} H₃C O CH₃ CSIR NET Dec 2011 | Q126 | Organic Spectroscopy / 1H and 13C NMR Spectral Structure Elucidation
    एक कार्बनिक यौगिक (अणुसूत्र $\mathrm{C_{15}H_{14}O}$) निम्नलिखित $^1\mathrm{H}$ तथा $^{13}\mathrm{C}$ NMR आंकड़े प्रदर्शित करता है: $^1\mathrm{H}\text{ NMR}: \delta\ 2.4\ (s, 6\mathrm{H}), 7.2\ (d, J = 8\text{ Hz}, 4\mathrm{H}), 7.7\ (d, J = 8\text{ Hz}, 4\mathrm{H})\text{ ppm}$ $^{13}\mathrm{C}\text{ NMR}: \delta\ 21.0, 129.0, 130.0, 136.0, 141.0, 190.0\text{ ppm}$ दिए गए विकल्पों में से यह यौगिक कौन-सा है? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} H₃C O CH₃
  107. Identify appropriate reagents A and B in the following reactions: (Chemoselective reductions of ester and carboxylic acid functionalities) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} COOMe COOH A (LiAlH₄): reduces both B (BH₃·SMe₂): reduces COOH CSIR NET Dec 2011 | Q127 | Organic Synthesis / Selective Borane-DMS vs LiAlH4 Reductions
    निम्नलिखित रासायनिक रूपांतरणों में उपयुक्त अभिकर्मकों A तथा B की पहचान कीजिए: (एस्टर और कार्बोक्सिलिक अम्ल समूहों का चयनात्मक अपचयन) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} COOMe COOH A (LiAlH₄): reduces both B (BH₃·SMe₂): reduces COOH
  108. The correct sequence of the reagents to be employed in the following transformation is: (Cyclic $\alpha,\beta$-unsaturated ketone $\to$ alkynone fragmentation) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O 1. TsNHNH₂ 2. AcOH, Δ HC≡C O CSIR NET Dec 2011 | Q128 | Name Reactions / Eschenmoser-Ohloff Fragmentation of Epoxyketones
    निम्नलिखित रूपांतरण में प्रयुक्त किए जाने वाले अभिकर्मकों का सही अनुक्रम क्या है? (चक्रीय $\alpha,\beta$-असंतृप्त कीटोन $\to$ एल्काइन-कीटोन विखंडन) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O 1. TsNHNH₂ 2. AcOH, Δ HC≡C O
  109. Reaction of $11.6\text{ g}$ of the aldehyde A (mol. wt. 232) with $462\text{ mg}$ of Wilkinson's catalyst (mol. wt. 923) provided $9.2\text{ g}$ of alkene B. The $\text{mol \%}$ of the catalyst used and the yield of the reaction, approximately are: CSIR NET Dec 2011 | Q129 | Organometallic Catalysis / Wilkinson Decarbonylation Stoichiometry
    एल्डिहाइड A ($11.6\text{ g}$, अणुभार $232$) की विल्किंसन उत्प्रेरक ($462\text{ mg}$, अणुभार $923$) के साथ अभिक्रिया से $9.2\text{ g}$ एल्कीन B प्राप्त हुई। प्रयुक्त उत्प्रेरक का $\text{mol \%}$ तथा अभिक्रिया की लब्धि (yield) लगभग क्या हैं?
  110. The major products A and B in the following reaction sequence are: (Chiral auxiliary aldehyde + $\mathrm{NH_4Cl, NaCN}$ then $\mathrm{H_3O^+} \to \mathbf{A} \xrightarrow{\mathrm{LiAlH_4,\ CH_3COOH}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} R*-CHO 1. NH₄Cl, NaCN 2. H₃O⁺ R*-CH(NH₂)COOH (A) LiAlH₄ (B) CSIR NET Dec 2011 | Q130 | Asymmetric Synthesis / Strecker Amino Acid & Chiral Auxiliary
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (किरल एल्डिहाइड + $\mathrm{NH_4Cl, NaCN}$ फिर $\mathrm{H_3O^+} \to \mathbf{A} \xrightarrow{\mathrm{LiAlH_4,\ CH_3COOH}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} R*-CHO 1. NH₄Cl, NaCN 2. H₃O⁺ R*-CH(NH₂)COOH (A) LiAlH₄ (B)
  111. The major products A and B in the following reaction sequence are: $\mathrm{Ph-CHO} \xrightarrow[2.\ \mathrm{LiAlH_4,\ -78\ ^\circ C}]{1.\ \mathrm{Ph_3P=CHCOOEt}} \mathbf{A} \xrightarrow{\mathrm{TsOH}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ph-CHO 1. Ph₃P=CHCOOEt 2. LiAlH₄ Ph-CH=CH-CH₂OH (A) TsOH O O (B) CSIR NET Dec 2011 | Q131 | Organic Synthesis / Wittig Olefination & Stereoselective Lactonization
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? $\mathrm{Ph-CHO} \xrightarrow[2.\ \mathrm{LiAlH_4,\ -78\ ^\circ C}]{1.\ \mathrm{Ph_3P=CHCOOEt}} \mathbf{A} \xrightarrow{\mathrm{TsOH}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Ph-CHO 1. Ph₃P=CHCOOEt 2. LiAlH₄ Ph-CH=CH-CH₂OH (A) TsOH O O (B)
  112. The major products A and B in the following reaction sequence are: (2-Pyrone $\xrightarrow{\Delta} \mathbf{A} \xrightarrow{\Delta} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O Δ (2 mol) [4+2] endo (A) -CO₂ (B) CSIR NET Dec 2011 | Q132 | Pericyclic Reactions / Diels-Alder Dimerization of Pyrones
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (2-पाइरोन $\xrightarrow{\Delta} \mathbf{A} \xrightarrow{\Delta} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O Δ (2 mol) [4+2] endo (A) -CO₂ (B)
  113. Appropriate $^1\mathrm{H}$ NMR chemical shifts ($\delta$) for the protons A-D for the following compound are: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} CH₃CO (D) H_B OCH₃ (C) H_A δ(H_B) = 5.7 ppm δ(H_A) = 6.8 ppm CSIR NET Dec 2011 | Q133 | Organic Spectroscopy / 1H NMR Chemical Shifts of Conjugated Enones
    दिए गए $\alpha,\beta$-असंतृप्त यौगिक के प्रोटॉनों A-D के लिए उपयुक्त $^1\mathrm{H}$ NMR रासायनिक विस्थापन ($\delta$, ppm में) क्या हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} CH₃CO (D) H_B OCH₃ (C) H_A δ(H_B) = 5.7 ppm δ(H_A) = 6.8 ppm
  114. The major product formed in the following reaction sequence is: (Tertiary amine N-oxide $\xrightarrow[2.\ \mathrm{O_3; Me_2S}]{1.\ \mathrm{(CF_3CO)_2O; NEt_3}}$ product) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe N⁺ O⁻ 1. (CF₃CO)₂O, NEt₃ 2. O₃, Me₂S OMe CHO CSIR NET Dec 2011 | Q134 | Organic Synthesis / Polonovski Reaction & Ozonolysis
    निम्नलिखित अभिक्रिया अनुक्रम में निर्मित मुख्य उत्पाद क्या है? (तृतीयक एमीन N-ऑक्साइड $\xrightarrow[2.\ \mathrm{O_3; Me_2S}]{1.\ \mathrm{(CF_3CO)_2O; NEt_3}}$ उत्पाद) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe N⁺ O⁻ 1. (CF₃CO)₂O, NEt₃ 2. O₃, Me₂S OMe CHO
  115. Citronellol A on oxidation with pyridinium chlorochromate (PCC) followed by treatment with aq. sodium hydroxide gives the product B (IR: $1680\text{ cm}^{-1}$); whereas oxidation with PCC in the presence of sodium acetate gives product C (IR: $1720\text{ cm}^{-1}$). Compound B and C are: .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Me Me OH Citronellol (A) PCC, NaOAc C: Citronellal (1720 cm⁻¹) PCC then NaOH B: Pulegone (1680 cm⁻¹) CSIR NET Dec 2011 | Q135 | Organic Oxidation / PCC with Sodium Acetate vs Base Hydrolysis
    सिट्रोनेलोल (Citronellol, A) का पिरिडीनियम क्लोरोक्रोमेट (PCC) द्वारा ऑक्सीकरण तथा उसके पश्चात जलीय सोडियम हाइड्रॉक्साइड के साथ उपचार करने पर उत्पाद B (IR: $1680\text{ cm}^{-1}$) प्राप्त होता है; जबकि सोडियम एसीटेट की उपस्थिति में PCC द्वारा ऑक्सीकरण करने पर उत्पाद C (IR: $1720\text{ cm}^{-1}$) प्राप्त होता है। यौगिक B तथा C क्रमशः क्या हैं? .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} Me Me OH Citronellol (A) PCC, NaOAc C: Citronellal (1720 cm⁻¹) PCC then NaOH B: Pulegone (1680 cm⁻¹)
  116. Match the following starting compounds with corresponding products in photochemical reactions: Starting material: (i) Ketone with γ-hydrogen (ii) Ketone + alkene (iii) Cyclic ketone Products: (A) Oxetane (B) Norrish Type I cleavage product (C) Di-π-methane product (D) Pinacol product (E) Norrish Type II cleavage product .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O (i) Norrish II hν O (ii) Oxetane O (iii) Norrish I CSIR NET Dec 2011 | Q136 | Photochemistry / Norrish Type I, Type II and Paterno-Buchi
    निम्नलिखित प्रारंभिक यौगिकों को प्रकाश-रासायनिक अभिक्रियाओं में उनके संगत उत्पादों के साथ सुमेलित कीजिए: प्रारंभिक पदार्थ: (i) $\gamma$-हाइड्रोजन युक्त कीटोन (Ketone with γ-hydrogen) (ii) कीटोन + एल्कीन (Ketone + alkene) (iii) चक्रीय कीटोन (Cyclic ketone) उत्पाद: (A) ऑक्सेटेन (Oxetane, Paterno-Büchi product) (B) नॉरिश टाइप I विदलन उत्पाद (Norrish Type I acyl-alkyl radical cleavage) (C) डाई-$\pi$-मेथेन उत्पाद (D) पिनैकॉल उत्पाद (E) नॉरिश टाइप II विदलन उत्पाद (Norrish Type II enol + alkene) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O (i) Norrish II hν O (ii) Oxetane O (iii) Norrish I
  117. The major products A and B in the following reaction sequence are: $\mathrm{CH_3COCH_2COOCH_3} \xrightarrow[2.\ \mathrm{Br-CH_2-CH=CH_2\ (1\ eq.)}]{1.\ \mathrm{LDA\ (2\ eq.)}} \mathbf{A} \xrightarrow[2.\ \mathrm{H_3O^+}]{1.\ \mathrm{LiAlH_4}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O OMe 1. LDA (2 eq.) 2. Allyl-Br (1 eq.) Allyl-CH₂COCH₂COOMe (A) CSIR NET Dec 2011 | Q137 | Organic Synthesis / Kinetic Dianion Alkylation of Ketoesters
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? $\mathrm{CH_3COCH_2COOCH_3} \xrightarrow[2.\ \mathrm{Br-CH_2-CH=CH_2\ (1\ eq.)}]{1.\ \mathrm{LDA\ (2\ eq.)}} \mathbf{A} \xrightarrow[2.\ \mathrm{H_3O^+}]{1.\ \mathrm{LiAlH_4}} \mathbf{B}$ .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O OMe 1. LDA (2 eq.) 2. Allyl-Br (1 eq.) Allyl-CH₂COCH₂COOMe (A)
  118. The major products A and B of the following reaction sequence are: (Cyclic keto-ester $\xrightarrow[2.\ \mathrm{TsOH}]{1.\ \mathrm{PhMgBr}} \mathbf{A} \xrightarrow[2.\ \mathrm{PCC},\ 3.\ m\text{-CPBA}]{1.\ \mathrm{BH_3 \cdot SMe_2}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O COOMe 1. PhMgBr 2. TsOH (A) Phenyl enone m-CPBA (B) CSIR NET Dec 2011 | Q138 | Organic Synthesis / Grignard Addition & Baeyer-Villiger Oxidation
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (चक्रीय कीटो-एस्टर $\xrightarrow[2.\ \mathrm{TsOH}]{1.\ \mathrm{PhMgBr}} \mathbf{A} \xrightarrow[2.\ \mathrm{PCC},\ 3.\ m\text{-CPBA}]{1.\ \mathrm{BH_3 \cdot SMe_2}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O COOMe 1. PhMgBr 2. TsOH (A) Phenyl enone m-CPBA (B)
  119. The major products A and B in the following reaction sequence are: (Cyclopentadienone $\xrightarrow{\Delta\text{ (dimer)}} \mathbf{A} \xrightarrow[2.\ \mathrm{TsOH}]{1.\ \mathrm{NaBH_4-MeOH}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O Δ (dimer) [4+2] endo (A) Endo dimer NaBH₄(B) CSIR NET Dec 2011 | Q139 | Organic Reactions / Cyclopentadienone Thermal Dimerization
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (साइक्लोपेंटाडाइए Stray कीटोन $\xrightarrow{\Delta\text{ (dimer)}} \mathbf{A} \xrightarrow[2.\ \mathrm{TsOH}]{1.\ \mathrm{NaBH_4-MeOH}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O Δ (dimer) [4+2] endo (A) Endo dimer NaBH₄(B)
  120. The major products A and B in the following reaction sequence are: (Anisole $\xrightarrow{\mathrm{Li/liq.\ NH_3,\ t\text{-BuOH}}} \mathbf{A} \xrightarrow{m\text{-CPBA\ (1\ eq.)}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe Li / liq. NH₃ t-BuOH OMe (A) m-CPBA (B) CSIR NET Dec 2011 | Q140 | Organic Synthesis / Birch Reduction & Regioselective Epoxidation
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (ऐनिसोल $\xrightarrow{\mathrm{Li/liq.\ NH_3,\ t\text{-BuOH}}} \mathbf{A} \xrightarrow{m\text{-CPBA\ (1\ eq.)}} \mathbf{B}$) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} OMe Li / liq. NH₃ t-BuOH OMe (A) m-CPBA (B)
  121. The correct reagents for effecting the following reactions are: (Ketone $\to$ oxirane; $\alpha,\beta$-unsaturated ketone $\to$ cyclopropane; isolated alkene $\to$ cyclopropane) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} R₂C=O A: Me₂S=CH₂ Oxirane (Epoxide) B: Me₂S(O)=CH₂ Conjugate Addition C: CH₂I₂, Zn-Cu Alkene Cyclopropane CSIR NET Dec 2011 | Q141 | Organic Reagents / Sulfur Ylides vs Simmons-Smith Cyclopropanation
    निम्नलिखित रूपांतरणों को संपन्न करने के लिए सही अभिकर्मक कौन-से हैं? (कीटोन $\to$ ऑक्साइरेन; $\alpha,\beta$-असंतृप्त कीटोन $\to$ साइक्लोप्रोपेन; विलगित एल्कीन $\to$ साइक्लोप्रोपेन) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} R₂C=O A: Me₂S=CH₂ Oxirane (Epoxide) B: Me₂S(O)=CH₂ Conjugate Addition C: CH₂I₂, Zn-Cu Alkene Cyclopropane
  122. The major products A and B of the following reaction sequence are: (Azide derivative $\xrightarrow[2.\ \mathrm{Cbz-Cl,\ Et_3N}]{1.\ \mathrm{Ph_3P,\ H_2O}} \mathbf{A} \xrightarrow[\text{ii. }\mathrm{NaBH_4}]{\text{i. }\mathrm{Hg(OAc)_2}} \mathbf{B}$) CSIR NET Dec 2011 | Q142 | Organic Synthesis / Multistep Heterocycle Functionalization
    निम्नलिखित अभिक्रिया अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (ऐजाइड व्युत्पन्न $\xrightarrow[2.\ \mathrm{Cbz-Cl,\ Et_3N}]{1.\ \mathrm{Ph_3P,\ H_2O}} \mathbf{A} \xrightarrow[\text{ii. }\mathrm{NaBH_4}]{\text{i. }\mathrm{Hg(OAc)_2}} \mathbf{B}$)
  123. The major products A and B in the following synthetic sequence are: (Suzuki coupling / alkylation followed by acid-catalyzed Paal-Knorr cyclization) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O R'-NH₂ H⁺, Δ N R' Substituted Pyrrole CSIR NET Dec 2011 | Q143 | Heterocyclic Chemistry / Paal-Knorr & Hantzsch Condensations
    निम्नलिखित संश्लेषण अनुक्रम में मुख्य उत्पाद A तथा B क्या हैं? (सुज़ुकी/हेक युग्मन तथा अम्ल-उत्प्रेरित चक्रीकरण) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O R'-NH₂ H⁺, Δ N R' Substituted Pyrrole
  124. The major products A and B in the following synthetic strategy are: (Ketone + RAMP/SAMP hydrazine $\to$ LDA, $-78\ ^\circ\mathrm{C}$, MeI $\to \mathbf{A} \xrightarrow{\text{Ozonolysis}} \mathbf{B}$) CSIR NET Dec 2011 | Q144 | Physical Organic / E2 Elimination Regioselectivity (Saytzeff/Hofmann)
    निम्नलिखित संश्लेषण रणनीति में मुख्य उत्पाद A तथा B क्या हैं? (कीटोन + RAMP/SAMP हाइड्राजीन $\to$ LDA, $-78\ ^\circ\mathrm{C}$, MeI $\to \mathbf{A} \xrightarrow{\text{Ozonolysis}} \mathbf{B}$)
  125. The product formed and the process involved in the following reaction are: (Allyl ester potassium enolate $\xrightarrow{\Delta}$ product) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O⁻K⁺ Δ [3,3]-Claisen O O⁻K⁺ CSIR NET Dec 2011 | Q145 | Pericyclic Chemistry / Claisen Rearrangement of Allyl Vinyl Ethers
    निम्नलिखित अभिक्रिया में निर्मित उत्पाद तथा इसमें सम्मिलित प्रक्रम क्या हैं? (पोटेशियम ईनोलेट $\xrightarrow{\Delta}$ उत्पाद) .b{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;fill:none;}.bd{stroke:#2c3e50;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:3,3;fill:none;}.w{fill:#2c3e50;stroke:#2c3e50;stroke-width:1;}.t{font-family:Arial,sans-serif;font-size:12px;font-weight:bold;fill:#1e293b;text-anchor:middle;dominant-baseline:central;}.arr{stroke:#2563eb;stroke-width:2;fill:#2563eb;}.lbl{font-family:Arial,sans-serif;font-size:11px;font-weight:normal;fill:#475569;text-anchor:middle;} O O⁻K⁺ Δ [3,3]-Claisen O O⁻K⁺

High-Yield Syllabus Breakdown Tested

The live test draws questions from high-weightage topics across all three chemistry disciplines:

1. Inorganic Chemistry

  • Coordination Chemistry: Crystal Field Theory (CFT), Jahn-Teller distortion, electronic spectra (Orgel and Tanabe-Sugano diagrams), magnetic properties.
  • Organometallic Compounds: 18-electron rule, oxidative addition, reductive elimination, migratory insertion, homogeneous catalysts (Wilkinson, Heck, Suzuki, Grubbs).
  • Bioinorganic Chemistry: Metalloproteins, oxygen transport (Hemoglobin, Myoglobin, Hemocyanin), cytochromes, and nitrogenase mechanisms.
  • Main Group & Clusters: Wade-Mingos rules, carboranes, boron hydrides, silicates, and phosphazenes.

2. Organic Chemistry

  • Reaction Mechanisms & Intermediates: Carbocations, carbenes, nitrenes, benzyne, radical additions, named rearrangements (Favorskii, Baeyer-Villiger, Stevens).
  • Stereochemistry: Asymmetric induction, Cram and Felkin-Anh models, topicity, optical activity, axial chirality (allenes, spiranes, biphenyls).
  • Pericyclic Reactions & Photochemistry: Woodward-Hoffmann rules, FMO analysis of electrocyclic reactions, cycloadditions, sigmatropic shifts, Norrish Type I and II processes.
  • Organic Spectroscopy: Structural determination using combined 1D/2D $^1\text{H}$-NMR, $^{13}\text{C}$-NMR, IR, UV-Vis, and Mass Spectrometry data.

3. Physical Chemistry

  • Quantum Mechanics: Particle in a 1D/3D box, harmonic oscillator, rigid rotor, angular momentum, perturbation and variation methods.
  • Chemical Kinetics & Catalysis: Steady-state approximation, enzyme kinetics (Michaelis-Menten), unimolecular reactions (Lindemann-Hinshelwood mechanism), transition state theory.
  • Thermodynamics & Statistical Mechanics: Maxwell relations, partial molar quantities, Gibbs-Duhem equation, partition functions (translational, rotational, vibrational), Maxwell-Boltzmann distribution.
  • Molecular Spectroscopy: Rotational (rigid and non-rigid), vibrational (harmonic and anharmonic), Raman spectra, selection rules.

Key Features of the Mission JRF Live Test

  • Real-Time CBT Interface: Test navigation, question palette (Answered, Not Answered, Marked for Review), and countdown timers match official NTA standards.
  • Instant Detailed Solutions: Step-by-step reaction mechanisms, mathematical derivations, and reference explanations provided immediately upon test completion.
  • Comprehensive Performance Metrics: Sectional score breakdown, accuracy percentage, time spent per question, and comparative percentile ranking.
  • Negative Marking Control Analysis: Identifies instances where guessed answers reduced overall scores, helping refine Part C question-selection strategy.

How to Attempt the Live Test

  1. Access the Portal: Navigate to the Live Test Section and select CSIR NET Chemical Sciences: Mission JRF Mock Test.
  2. Review Instructions: Ensure a stable internet connection and verify instructions regarding section navigation and marking criteria.
  3. Timed Submission: Attempt questions within the 180-minute window; results submit automatically when time expires.
  4. Review Scorecard & PDF Keys: Download the complete question paper with explanatory answer keys for post-test analysis.

Frequently Asked Questions (FAQs)

What is the passing cutoff for JRF in Chemical Sciences?

The cutoff varies each cycle based on exam difficulty and applicant count. Typically, the General/UR category JRF cutoff ranges between 52% and 58% (approximately 104–116 marks out of 200).

Can I review questions marked for review after time ends?

Only responses saved and marked for review are evaluated according to official exam protocols. Once the three-hour timer concludes, the session auto-submits.

How should I prioritize questions between Part B and Part C?

Part C carries 100 marks (50% of the total weightage) with high negative marking (-1 per incorrect response). Prioritize selecting 25 questions in Part C where mechanisms or calculations are definitive before completing Part B.

Leave a Reply

*

error: Content is Protected