1.

The oxidationpotential values of A,B,C and D are -0.03 V + 0.18 V-0.07and +0.1 v respecitively thenon spontaneous cell reaction takes place between

Answer»

A and B
B an D
D and A
B and C

Solution :(i) The electrodewith higheroxidation potential acts as anodeand electrode withloweroxidationpitentialacts as cathode
(ii) CELL REACTION is spontaneous when `E_(Cell)` is POSTIVE
`E_(Cell)=E_(C )-E_(A)`
Givenoxidation potentialof A =- 0.03 V
oxidation potential of B= + 0.108 V
oxidation potential of C= 0.07 V
oxidation potentialof D =+ 0.1 V
`because` oxidationpotentialof Bis more than A
`therefore` oxidation of A is not possible
`therefore` Thus CEL having A as andoe and B as cathode is not possible


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