Question

Find the number of electrons transferred in the equation Cu(g) + 2Ag^+(aq) → Cu^2+(aq) + 2Ag(s).

(a) 4

(b) 3

(c) 2

(d) 1

This question was addressed to me by my college director while I was bunking the class.

Question is from Electrochemistry topic in portion Electrochemistry of Chemistry – Class 12

Answer 1

Correct answer is (c) 2

Explanation: 2Ag^+(aq) + 2e^– → 2Ag(s)

From the equation it is evident that 2Ag^+ takes 2 electrons from Cu and neutralizes to form 2Ag.