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The solution of nickel sulphate in which...

The solution of nickel sulphate in which nickel rod is dipped is diluted 10 times. The halfcell potential of nickel: 

A

Decrease by 60mV

B

Increase by 30V

C

Decreses by 30mV

D

Decreases by 60V.

Text Solution

Verified by Experts

The correct Answer is:
C
`Ni^(2+)+2e^(-)rarrNi`
`E=E^(@)+(0.059)/(2)"log"([Ni^(2+)])/([Ni])`
`=E^(@)+(0.059)/(2)"log"1xx10^(-1)`
`=(E^(@)-0.03)` volts.
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