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An aqueous solution containing 1 M NiSO...

An aqueous solution containing `1 M NiSO_(4) & 1 M S_(2) O_(8)^(2-)` is electrolysed using palladium electrode, at `25^(@)C`
`{:(Ni^(+2)+2e^(-) rarrNi,,E^(@)=-0.25 V),(2H^(+)+2e^(-)rarrH_(2),,E^(@)=0.00 V ),(O_(2)+4H^(+)+4e^(-)rarr2H_(2)O,,E^(@)=1.23 V),(Pd^(+2)+2e^(-) rarrPd,,E^(@) = 0.92 V),(S_(2)O_(8)^(2-)+2e^(-) rarr 2SO_(4)^(2-),,E^(@)=2 V):}`
pH of solution is 7.
Select the correct statement on the basis of above given information.
(Ignore over voltage & neglect variation of `E_(Pd^(+2)//Pd)^(@)` with concentration)

A

Reaction at anode is `Pd rarr Pd^(+2)+2e^(-)`

B

Reaction at anode is `2H_(2)O rarr O_(2)+4H^(+)+4e^(-)`

C

Reaction at cathode is `Ni^(+2)+2e^(-) rarr Ni`

D

Reaction at cathode is `2H^(+) + 2e^(-) rarr H_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B, C
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