Q. The chemical equivalent of silver is 108. If the current in a silver voltmeter is $2\ amp,$ the time required to deposit 27 $grams$ of silver will be
A) $8.57\ hrs$
B) $6.70\ hrs$
C) $3.35\ hrs$
D) $12.50\ hrs$
Explanation
(c) $m = Zi \Rightarrow t = \frac{m}{Zi} = \frac{m \times F}{E \times i}\ \ \ \left\lbrack \because Z = \frac{E}{F} \right\rbrack$
$t = \frac{27 \times 96500}{108 \times 2} = 12062.5\sec{= \frac{12062.5}{3600}}hr = 3.35\ hr$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.