Question

Given below are two statements: one is labelled as $\text{Assertion A}$ and the other is labelled as $\text{Reason R}$.

$\text{Assertion A:}$ A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.

$\text{Reason R:}$ Benzoic acid is soluble in hot water.
In the light of the above statements, choose the most appropriate answer from the options given below.

• A. Both A and R are true but R is NOT the correct explanation of A
• B. Both A and R are true and R is the correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true

Answer 1

The correct option is D A is false but R is true

Both benzoic acid and naphthalene will dissolve in benzene. Thus, benzoic acid cannot be separated from the mixture. Hence assertion is wrong.

Benzoic acid is almost insoluble in cold water but soluble in hot water. Hence Reason is true