Question

What is the approximate strength of current that will deposit 0.5 gm of silver on a spoon in 7.5 minutes?

• A. 1 A
• B. 0.005 A
• C. 0.5 A
• D. 0.1 A

Answer 1

The correct option is A 1 A

Given : $W=0.5$ gm $t=7.5$ minutes $=450$ s

Electrochemical equivalent of Ag $Z=\frac{108}{96500}$ gm/C

Using $W=ZIt$

$\therefore$ $0.5=\frac{108}{96500}\times I\times 450$

$⟹I\approx 1$ A