Question

Assertion :There is no reaction known for which $\Delta G$ is positive, yet it is spontaneous. Reason: For photochemical reaction, $\Delta G$ is negative.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

When $△H$ is positive and $$△S$ is in negative, the sign of $△G$ is always will always be positive and the relation can never be spontaneous. This corresponds to both driving force favors the reaction, but the other does not, it is the temperature that determines the sign of $△G$.

Both Assertion and and Reason are incorrect.