A) \[A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] (increasing ionic size)
B) B < C < N < O (increasing first ionisation enthalpy)
C) \[I\text{ }<\text{ }Br\text{ }<\text{ }Cl\text{ }<\text{ }F\] (increasing electron gain enthalpy)
D) \[Li\text{ }<\text{ }Na\text{ }<\text{ }K\text{ }<\text{ }Rb\] (increasing metallic radius)
Correct Answer: B
Solution :
(b, c) B < C < N < O (given I.P. order) B < C < O < N (correct) I < Br < Cl < F (given \[\Delta {{H}_{eg}}\] order) I < Br < F < Cl (Correct)
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