GATE Chemistry Free Mock Test

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

2. 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

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

4. 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

5. Which of the following octahedral complex exhibits tetragonal compression

6. 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,

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

8. 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-

9. The quantity remain constant in Grand Canonical Ensemble

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

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

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

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

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

16. 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,

17. Lanthanoid used in glass blower’s goggles is

18. The collect statement among the following is

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

20. 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⁺ 

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,