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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
- #JEE Main
- #Joint Entrance Examination Main
- #Class 11
- #Chemistry
- #Classification of Elements and Periodic table
- #Engineering
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.
Both A and R are correct and R is the correct explanation of A.
Both A and R are correct but R is NOT the correct explanation of A.
A is correct but R is not correct.
A is not correct but R is correct.
Answers (1)
As we have learnt,
This can be justified by
(i) Oxygen has a configuration and two out of the four '2p' electrons must occupy same orbital. So they experience more electron-electron repulsion.
(ii) This is because of the extra stability of the half filled configuration of Nitrogen
Hence, the correct answer is option (1)
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