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 2 p orbitals of oxygen experience more electron-electron repulsion.
In the light of the above statements, choose the correct answer from the options given below.
Select the correct option:
A
Both A and R are correct and R is the correct explanation of A.
B
Both A and R are correct but R is NOT the correct explanation of A.
C
A is correct but R is not correct.
D
A is not correct but R is correct
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
lonisation energy $=\mathrm{N}>\mathrm{O}$.
In oxygen atom, 2 of the $4 2 p$ electrons must occupy the same $2 p$ orbital resulting in an increased electron electron-repulsion.
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