Assertion : Sodium ions are discharged in preference to hydrogen ions at a mercury cathode: Reason: `Na^(+)` is a strong reducing agent in comparison to `H^(+)` ion.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
D. If both (A) and (R) are incorrect.

Answer

B

Explanation

If redox reaction is spontaneous, `triangle` G is negative andhence `E^(@)` is positive. -`triangleG^(@) = nFE^(@)` cell