Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be

Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.
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:

Canvas Classes · Accepted Answer

Step 1: Understand the Assertion

Assertion (A): "A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene."

✅ TRUE — This refers to differential extraction:
- Benzoic acid is soluble in  (forms sodium benzoate), while naphthalene is not
- Alternatively, benzoic acid has very low solubility in benzene compared to naphthalene
- The mixture dissolved in benzene: naphthalene dissolves well; benzoic acid is less soluble → can crystallise out

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