Assertion (A): For every chemical reaction at equilibrium, standard Gibbs enegry of the reaction is zero.
Reason (R ) : At constant temperature and pressure chemical reactions are spontaneous in the direction of the decreasing Gibbs energy.

Options

A. Statement-1 is true, statement 2 is true, statement 2 is a correct explanation for statement.2
B. statement-1 is true, statement 2 is true, statement 2 is not a correc explanation for statement 2
C. statement 1 is ture, statement 2 is false
D. statement-1 is false, statement-2 is true

Answer

D

Explanation

At equilibrium `Delta G = 0`, but standard Gibb's energy `(Delta G^(@))` of a reaction mayor may not be zero. For should be more negative, .i.e, `Delta G lt 0` Hence, (D) is correct option