Assertion :The ionization energy of $N$ is more than that of $O$ . Reason: Electronic configuration of $N$ is more stable due to half-filled $2 p$ -orbitals.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Assertion
The ionization energy of N (1402 kJ/mol) is more than that of O (1324 kJ/mol).
Reason
Electronic configuration of N is more stable due to half-filled 2p-orbitals. Hence, more energy is required to remove an electron from N than from O.
The electronic configuration of N is $1 s^{2} 2 s^{2} 2 p^{3}$ .
The electronic configuration of O is $1 s^{2} 2 s^{2} 2 p^{4}$ .

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Assertion :The ionization energy of N is more than that of O. Reason: Electronic configuration of N is more stable due to half-filled 2p-orbitals.

Assertion :The ionization energy of $N$ is more than that of $O$ . Reason: Electronic configuration of $N$ is more stable due to half-filled $2 p$ -orbitals.