1.

In which of the following arrangements the order is NOT according to the property indicated against it [AIEEE 2005]

A. \[A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] : Increasing ionic size
B. \[B<C<N<O\] : Increasing first ionization enthalpy
C. \[I<Br<F<Cl\] : Increasing electron gain enthalpy (with negative sign)
D. \[Li<Na<K<Rb\] : Increasing metallic radius
Answer» C. \[I<Br<F<Cl\] : Increasing electron gain enthalpy (with negative sign)


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