Question

1 A of current flowing through a silver voltameter for 25 minutes deposits 1.5 gm of silver. The e.c.e of silver will be (in gmC${}^{-1}$)

• A. 0.0001
• B. 0.001
• C. 0.01
• D. 0.1

Answer 1

Answer: (B)

0.001

Given : $t=25$ minutes $=1500$ s $W=1.5$ gm $I=1A$

Using $W=ZIt$ where $Z$ is electrochemical equivalent (e.c.e)

$\therefore$ $1.5=Z\times 1\times 1500$ $⟹Z=0.001$ gm/C