GATE Chemistry Free Mock Test

1. Value of β (nephelauxetic parameter) is maximum for

2. The collect statement among the following is

3. A complex of Ni(ll), [NiCl₂(PPh₃)₂] is paramagnetic, the analogous complex of Palladium (II) is diamagnetic, the number of isomers shown by both complexes respectively are

4. The pair of lanthanoids showing strong emission spectrum are,

5. Structures of Fe₅(CO)₁₅C and Os₅(CO)₁₆ respectively are

6. The colour and transition for the deep coloration of [Fe(NCS)₆]^3- and [Fe(bpy)₃]²⁺ respectively are,

7. The spinel structure of Cr₂FeO₄ has cubic close packed arrangement of oxide ions. The fractions of the tetrahedral and octahedral sites occupied by cation respectively are,

8. The correct order of second ionization potential among the following elements : Be, B, C, N and O is

9. Lanthanoid used in glass blower’s goggles is

10. Consider the following statements for catalase.
A. It is heme containing protein.
B. It catalyzes disproportionation of water.
C. Inactive site, the metal is in +3 oxidation state.
D. It catalyzes the reduction of dioxygen.
The correct statements are :

11. Which of the following octahedral complex exhibits tetragonal compression

12. The value of temperature at which 10% of the molecule in a system will be in first excited electronic state if this state is 400 kJ/mol above ground state is

13. In the trigonal prismatic crystal field, the d-orbital with the highest energy is

14. Among the following metal complexes, the Correct order of their increasing hydration energy is,
(I) [Co(H_2​O)_6​]²⁺ 
(II) [Fe(H_2​O)_6​]²⁺ 
(III) [V(H_2​O)_6​]²⁺ 
(IV) [Sc(H_2​O)_6​]²⁺ 

15. The reductive elimination product in [η⁵-Cp₂ Nb(H) η²-(C2H4)]

16. Select Correct Statement from following regarding f-block elements
(i) Absorption spectrum of lanthanoids (III) is largely dependent on nature of ligands.
(ii) Magnetic moments of lanthanoids (III) is generally greater than corresponding actinides (III)
(iii) Spectra of Heavier actinides (III) ions show resemblance with lanthanoids (III) ions
(iv) Ce³⁺ ion is colourless in aqueous medium.
The correct answer is,

17. Arrange the following complexes in the order of their respective wavelength of absorption:

(I) [Cr(H₂O)₆]³⁺

(II) [Cr(CN)₆]^3-

(III) [Cr(F)₆]^3-

18. The true statement about base hydrolysis of [Co(CN)₅JsBr]^3- is

19. The quantity remain constant in Grand Canonical Ensemble

20. The complex which shows fastest oxidative addition of dihydrogen (H2) is/are,

21. The correct order for the given properties is:
(A) :CH₂ < :CC1₂ < :CF₂ (Stability order)
(B) N-F < Sb-F < As-F < P-F (Bond energy order)
(C) BeF₂ > CaF₂ > SrF₂ (Covalent character order)
(D) NH₃ > PH₃ > AsH₃ > SbH₃ (Bond angle order)

22. The behaviour of HClO₄ in H₂SO₄ and SbF₅ in HF are respectively,