Revision - Electrochemistry & Kinetics

Grade 12 Chemistry — Revision - Electrochemistry & Kinetics: 25 practice questions with instant scoring and explanations.

1. Standard EMF is measured at:
2. In galvanic cell, cathode potential is:
3. For Zn | Zn²⁺ || Cu²⁺ | Cu, E°cell = 0.76 + 0.34 =:
4. ΔG° = −nFE° means when E° > 0:
5. Nernst equation: E = E° − (0.0592/n) log Q, when Q = K:
6. Conductivity increases with:
7. For second-order reaction, plot of 1/[A] vs t gives:
8. Half-life of first-order reaction is:
9. Activation energy decreases catalyst by:
10. For reaction 2A → products with Rate = k[A]², order is:
11. Arrhenius equation: k = Ae^(−Ea/RT), A represents:
12. Plot of ln k vs 1/T has slope = −Ea/R when R =:
13. Molecularity of elementary reaction is determined by:
14. Order vs molecularity: for overall reaction order ≤ molecularity is:
15. Rate-determining step is the ___ step:
16. For E2 reaction, breaking H-X is:
17. E1 mechanism shows rate independent of:
18. SN1 shows:
19. Collision theory: Z = number of collisions per unit volume per unit time depends on:
20. Electrochemistry uses Faraday constant F =:
21. For electrolysis, amount = (charge × E.W.) / F, where E.W. is:
22. Degree of dissociation α = Λm / Λ°m is used for:
23. For first-order reaction with k = 0.693 s⁻¹, t₁/₂ =:
24. Rate law cannot be determined from:
25. Pseudo first-order kinetics occurs when: