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Match column I (element) with its ionization enthalpy kJ/mole in column II
Element Ionization enthaloy kJ/mole
A O I 1086
B C II 1402
C F III 1314
D N IV 1681

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A	B	C	D
III	I	IV	II

A	B	C	D
II	I	IV	III

A	B	C	D
III	II	I	IV

A	B	C	D
III	I	II	IV

answer is A.

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Detailed Solution

Across the period size decreases and ionization enthalpy increases

Nitrogen is having more ionization enthalpy than oxygen because the electron is removed from stable half filled p - sub shell electronic configuration .

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