Question

In which of the following options order of arrangement does not agree with the variation of property indicated against it?

(a) Al³⁺ < Mg²⁺ < Na⁺ < F^- (increasing ionic size)

(b) B < C < N < O (increasing first ionization enthalpy)

(c) I < Br < F < Cl (increasing electron gain enthalpy)

(d) Li < Na < K < Rb (increasing metallic radius)

Answer 1

Correct option is (b) B < C < N < O (increasing first ionization enthalpy)