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A current of 2 A was passed for 2 h thro...

A current of 2 A was passed for 2 h through a solution of `CuSO_4` and 3 g of `Cu^(2+)` ions were discharged at cathode. The current efficiency is

A

0.422

B

0.261

C

0.63

D

0.4001

Text Solution

Verified by Experts

The correct Answer is:
C
w=Zit
`3=63.5/(2xx96500)xx2xx60xx60xxI`
`I=(3xx2xx96500)/(63.5xx2xx3600)=579000/457200` =1.26 A
Current efficiency= `("Current passed actually")/("Current passed experimentally")`
=`1.26/2xx100` =63%
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