Assertion : $H N O_{3}$ is a stronger acid than $H N O_{2}$ . Reason: In $H N O_{3}$ , there are two $N O$ linkage whereas in $H N O_{2}$ there is only one.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
$H N O_{3}$ is a stronger acid than $H N O_{2}$ because of higher dissociavity of $H N O_{3}$ . In $H N O_{3}$ , oxidation state of $N$ is $+ 5$ and for $H N O_{2}$ , oxidation state of $N$ is $+ 3$ . Higher the positive oxidation state, more is the electron deficiency and more is the acidity.

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Assertion :HNO3 is a stronger acid than HNO2. Reason: In HNO3, there are two NO linkage whereas in HNO2 there is only one.

Assertion : $H N O_{3}$ is a stronger acid than $H N O_{2}$ . Reason: In $H N O_{3}$ , there are two $N O$ linkage whereas in $H N O_{2}$ there is only one.