Question

How long will it take $5$ ampere of current to deposit $2g$ of copper from a solution of copper suplhate?
(Given : $CE$ of copper $=32,F=96500coulomb)$.

• A. $10.1minute$.
• B. $15.1minute$.
• C. $20.1minute$.
• D. $0.1minute$.

Answer 1

Answer: (C)

$20.1minute$.

Given:-

Current(I)$=5Ampere$.

Mass of $Cu$(m)$=2g$

Equivalent Weight of $Cu\left(E\right)=32$

Time in sec$=?$

Formula:-

Mass$=\frac{E}{F}\times I\times t$

$\therefore 2g=\frac{32}{96500C}\times 5\times t$

$\therefore \frac{2\times 96500}{32\times 5}=t$

$\therefore t=1206seconds$

$\therefore$ Time in minutes$=\frac{1206}{60}=20.1minute$