Given below are two statements: 

Assertion (A): Ecell should have a positive value for the cell to function.
Reason (R): Ecathode < Eanode

 
 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Hint: Ecell should have a positive value for the cell to function.
Feasibility of chemical reaction depends on Gibbs free energy which is related to Ecell as
G = -nFEcell
When the value of Ecell is positive then G becomes negative. Hence, the reaction becomes feasible. Hence, the Assertion is true.
But Ecathode < Eanode is not compulsory. Thus, the Assertion is true but the reason is false.