Question

Assertion (A) `E_("cell")` should have a positive value for the cell to function,
Reason(R) `E_("cathode")ltE_("anode")`
A. Both assertion and reason are true and the reason is the correct explanation of assertion.
B. Both assertion and reason are true and reason is not the correct explanation of assertion.
C. Assertion is true but the reason is false.
D. Both assertion and reason are false.

Answer 1

Assertion is true but the reason is false. Feasiblity of chemical reaction depends on Gibbs free energy which is related to `E_("cell")^(@)` as
`DeltaG^(-)=-nFE_("cell")^(-)`
When value of `E_("cell")^(@)` is positive then `DeltaG^(o+)` becomes negative. Hence, reaction becomes feasible ltbr . Correct reason is `E_("cathode")gtE_("anode")`