GATE Chemistry Free Mock Test

1. 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⁺ 

2. 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)

3. Lanthanoid used in glass blower’s goggles is

4. 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 :

5. The collect statement among the following is

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

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

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

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

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

11. 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,

12. 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,

13. 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

14. Which of the following octahedral complex exhibits tetragonal compression

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

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

17. 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

18. The quantity remain constant in Grand Canonical Ensemble

19. 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-

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

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

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