Question

Assertion: HI can not be prepared by the action of cone. H₂SO₄ on Kl.

Reason: HI is more volatile than H₂SO₄.

Options

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

Explanation:

The assertion is correct because HI cannot be prepared by the action of concentrated H₂SO₄ on KI since HI is easily oxidised by H₂SO₄ to iodine.
The reason is correct because HI is more volatile than H₂SO₄, so it tends to escape and also is easily oxidised by the strong oxidizing agent H₂SO₄, preventing its formation. Thus, the reason correctly explains the assertion Hence, both Assertion and Reason are correct, and the Reason is the correct explanation of the Assertion.