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Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The first ionization enthalpy for oxygen is lower than that of nitrogen.
Reason R: The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion.
In the light of the above statements, choose the correct answer from the options given below.

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Both A and R are correct and R is the correct explanation of A.

Both A and R are correct and R is not the correct explanation of A.

A is correct but R is not correct.

A is not correct but R is correct

answer is A.

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Detailed Solution

N-atom has a half-filled p-sub shell which provides it extra stability, O-atom on the other hand has four electrons in the p-subshell , causing greater electron-electron repulsion and lesser stability.

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