Question

One gram atomic weight of metal of the following can be deposited by one Faraday :

• A. AuCl${}_3$
• B. BaCl${}_2$
• C. NaCl
• D. CuSO${}_4$

Answer 1

The correct option is C NaCl

The charge on the metal cation in ${AuCl}_3$, ${BaCl}_2$, NaCl and ${CuSO}_4$ is +3, +2, +1 and +2 respectively. Hence to deposit one gram atomic weight of metal in these electrolytes is 3 F, 2 F, 1 F and 2 F respectively.