Assertion : Anexothermic process which is non spontaneous at high temperature may become spontaneous at low temperature.
Reason : Spontaneous process is an irreversible process and may be reversed by some external agency.

Options

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

Answer

B

Explanation

`Delta G = Delta H - T Delta S.` For exothermic process, `Delta H =- ve. For Delta G` to be - ve ( for spontaneous process), `Delta H gt `supontaneous process), `Delta H gt T Delta S` which is posible onlyat low temperature.