A) \[A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] (increasing ionic size)
B) \[B<C<N<O\] (increasing first ionisation enthalpy)
C) \[I<Br<Cl<F\](increasing electron gain enthalpy)
D) \[Li<Na<K<Rb\](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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