Question

When same quantity of electricity is passed for half an hour, the amount of $Cu$ and $Cr$ deposited are respectively $0.375g$ and $0.30g$. Ratio of electrochemical equivalent of $Cu$ and $Cr$ is

• A. $0.8$
• B. $1.25$
• C. $2.5$
• D. $1.62$

Answer 1

The correct option is B $1.25$

$\frac{W_1}{W_2}=\frac{E_1}{E_2}=\frac{Z_1}{Z_2}$

$=\frac{0.375}{0.3}=1.25$.

Hence option B is correct.