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Match element in column I with its ionization enthalpy in column II
element
ionization enthalpy kJ/mole
A H I 1086
B F II 1312
C N III 1402
D C IV 1681

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A	B	C	D
II	IV	III	I

A	B	C	D
I	IV	III	II

A	B	C	D
II	III	IV	I

A	B	C	D
IV	II	III	I

answer is A.

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Detailed Solution

across the period size decreases ionization enthalpy increases

correct order is : C < H < N < F

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