Question

Assertion: Nitric acid turns yellow on long standing.

Reason: It slowly decomposes to give NO₂ which gets dissolved in it.

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:

On long standing, nitric acid slowly decomposes into nitrogen dioxide (NO₂), a reddish-brown gas. This NO₂ dissolves in the acid, giving it a yellow colour. Hence, both the assertion and reason are correct, and the reason explains the assertion properly.