Question

Which of the following is the correct reaction at anode?

(a) Zn→Zn^+2 + 2e^–

(b) Zn→Zn^+ + e^–

(c) Cu^+2 + 2e^– → Cu

(d) Cu^++ e^– → Cu

The question was asked in unit test.

This interesting question is from Fuel Cells topic in division Electro Chemical Cells and Corrosion of Applied Chemistry

Answer 1

Right answer is (a) Zn→Zn^+2 + 2e^–

For explanation: The reaction at anode can be given by Zn→Zn^+2 + 2e^–. The reaction at cathode Cu^+2 + 2e^– → Cu.