Question

In which of te following options order of arrangement does not agree with the variation of property indicated against it?
(a)$A{l}^{3+}<M{g}^{2+}<N{a}^{+}<F-$ (Increasing ionic size)
(b) B < C < N < O (Increasing first ionlsation enthalpy)
(c) I < Br < Cl< F (increasing electron gain enthalpy)
(d) Li < Na< K < Rb (Increasing metallic radius)

Answer 1

Answers: (b) B < C < N < O (Increasing first ionisation enthalpy)
(c) I < Br < Cl< F (increasing electron gain enthalpy)

For increasing first ionization enthalpy, the order should be: B < C < O < N

For increasing electron gain enthalpy, the order should be: I < Br < F < Cl