Question

1 mol each of AgNO₃, CuSO₄ and AlCl₃ is electrolysed. Number of faradays required are in the ratio of :

• A. 1 : 1 : 1
• B. 1 : 2 : 3
• C. 3 : 2 : 1
• D. 1 : 3 : 1

Answer 1

Answer: (B)

1 : 2 : 3

Answer 2

Ag⁺ + e^– $\longrightarrow$Ag

Cu²⁺ + 2e^– $\longrightarrow$Cu

Al³⁺ + 3e^– $\longrightarrow$Al

Thus, number of faradays required by 1 mol each = 1 : 2: 3.