Question

How many coulombs of electricity are consumed when a $100mA$ current is passed through a solution of $AgN{O}_3$ for 30 minutes during electrolysis?

• A. 108
• B. 180
• C. 18000
• D. 3000

Answer 1

The correct option is B 180

Quantity of electricity passed $Q\left(C\right)=I\left(A\right)\times t\left(s\right)$.

Substitute $I\left(A\right)=100mA=0.1A$ and $t\left(s\right)=30min=1800s$ in the above equation.

$Q\left(C\right)=I\left(A\right)\times t\left(s\right)=0.1A\times 1800s=180C.$

Hence, option $B$ is correct.