Q. When 1 A current flows for 1 min through a silver voltmeter, it deposits 0.067 g of silver on the cathode, then how much charge will flow to deposit 108 g of silver?
A) $10.6 \times 10^{4}Cg_{eq}^{- 1}$
B) $9.67 \times$ $10^{4}Cg_{eq}^{- 1}$
C) 8.7${\ \times 10}^{4}Cg_{eq}^{- 1}$
D) 4.3 ${\ \times 10}^{4}Cg_{eq}^{- 1}`$
Explanation
(b) Charge $\rightarrow q = \frac{m}{z}$
Where, $z =$ electro chemical equivalent
$\therefore\ z = \frac{m}{It} = \frac{0.067}{1 \times 60} = 0.001117$
$q = \frac{108}{0.001117} = \ 9.67 \times 10^{4}\ C/g_{eq}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.