Question

Assertion: Entropy of system increases for a spontaneous reaction.
Reason: Enthalpy of reaction always decreases for spontaneous reaction.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (A)

$\Delta S$ is +ve and $\Delta H$ is -ve for a spontaneous reaction at all temperatures.