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Which is not the correct order for the stated property 

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By Expert Faculty of Sri Chaitanya
a
Ba>Sr>Mg: atomic radius
b
F > 0 > N: first ionisation enthalpy
c
CI> F >I:  electron affinity
d
 Te:  electronegativity
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detailed solution

Correct option is B

On moving along the period, ionisation enthalpy increases. In second period. the order of ionisation enthalpy should be as follows : F > 0 > N:But N has half-filled structure. therefore, it is more stable than O. That's why its ionisation enthalpy is higher than O Thus, the correct order of IE is F > N > O..

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