1.

An aqueous solution containing1 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 statementon the basis of above given information. (Ignore over voltage & neglect variation ofE_(Pd^(+2)//Pd)^(@) with concentration)

Answer»

REACTION at anode is `Pd rarr Pd^(+2)+2e^(-)`
Reaction at anode is `2H_(2)O rarrO_(2)+4H^(+)+4e^(-)`
Reaction at CATHODE is `Ni^(+2)+2e^(-) rarr Ni`
Reaction at cathode is `2H^(+) + 2e^(-) rarrH_(2)`

Answer :B::C


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