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NCERTCBSE CHEMISTRY CLASS 12 CHAPTERWISE MCQ QUESTIONS

Welcome to your Unit 3: Electrochemistry

1. 
If 96500 coulomb electricity is passed through CuSO4 solution, it will liberate
2. 
The charge required for the reduction of 1 mol of MnO4– to MnO2 is
3. 
The cell reaction of the galvanic cell.
4. 
Which of the following reaction is used to make fuel cell?
5. 
Galvanised iron sheets are coated with
6. 
Rust is a mixture of
7. 
How many coulombs are required for the oxidation of 1 mole of H2O to O2?
8. 
If limiting molar conductivity of Ca2+ and Cl– are 119.0 and 76.3 S cm2 mol-1, then the value of limiting molar conductivity of CaCl2 will be
9. 
Fused NaCl on electrolysis gives ………….. on cathode.
10. 
The standard electrode potentials for the half cell reactions are:
Zn → Zn2-– 2e E° = 0.76 V
Fe → Fe2- + 2 E° = -0.41 V
The emf of the cell reaction
Fe2- + Zn → Zn2- + Fe is
11. 
Which of the following is a secondary cell?
12. 
The standard reduction potentials of X, Y, Z metals are 0.52, -3.03, -1.18 respectively. The order of reducing power of the corresponding metals is:
13. 
Which of the following is not a good conductor?
14. 
For a certain redox reaction, E° is positive. This means that
15. 
Find the value of X
16. 
Molar conductivity of 0.15 M solution of KCl at 298 K, if its conductivity of 0.0152 S cm-1 w ill be
17. 
Electrical conductance through metals is called metallic or electronic conductance and is due to the movement of electrons. The electronic conductance depends on
18. 
The volume of H2 gas at NTP obtained by passing 4 amperes through acidified H+O for 30 minutes is:
19. 
The standard emf of a galvanic cell involving cell reaction with n = 2 is formed to be 0.295 V at 25° C. The equilibrium constant of the reaction would be

[Given F = 96500 (mol-1); R = 8.314 JK-1 mol-1]
20. 
The highest electrical conductivity of the following aqueous solutions is of?

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