Multiple choice

In which of the following arrangements is the order NOT according to the property indicated against it?

  1. Li < Na < K < Rb : Increasing metallic radii

  2. I < Br < F < Cl : Increasing electron gain enthalpies (with negative sign)

  3. B < C < N < O : Increasing first ionisation enthalpies

  4. Al3+ < Mg2+ < Na+ < F- : Increasing ionic size
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct order is B < C < O < N.

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