Assertion: Nitric acid turns yellow on long standing. Reason: It slowly decomposes to give NO2 which gets dissolved in it.

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KollegeApply · Accepted Answer

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.

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