Question

1 mol each of $AgN{O}_3,CuS{O}_4$ and $AlC{l}_3$ 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

$A{g}^{+}+e^{-}\to AgC{u}^{2+}+2e^{-}\to CuA{l}^{3+}+3e^{-}\to Al$
Thus, number of faradays required by 1 mol each = 1 : 2: 3.