In which of the following sets the sum of bond orders of three species is maximum?

In which of the following sets the sum of bond orders of three species is maximum?
  1. $\mathrm{B}_2, \mathrm{CN}^{-}, \mathrm{O}_2{ }^{2-}$
  2. $\mathrm{O}_2, \mathrm{~F}_2, \mathrm{O}_2{ }^{2+}$
  3. $\mathrm{O}_2^{-}, \mathrm{N}_2, \mathrm{O}_2^{+}$
  4. $\mathrm{C}_2, \mathrm{O}_2, \mathrm{He}_2^{2+}$

Solution

\begin{array}{|c|c|c|}\hline Molecule & Total electron & Bond order \\\hline \mathrm{B}_2 & 10 & 1 \\\hline \mathrm{CN}^{-} & 14 & 3 \\\hline \mathrm{O}_2{ }^{2-} & 18 & 1 \\\hline \mathrm{O}_2 & 16 & 2 \\\hline \mathrm{~F}_2 & 18 & 1 \\\hline \mathrm{O}_2{ }^{2+} & 14 & 3 \\\hline \mathrm{O}_2{ }^{-} & 17 & 1.5 \\\hline \mathrm{N}_2 & 14 & 3 \\\hline \mathrm{O}_2{ }^{+} & 15 & 2.5 \\\hline \mathrm{C}_2 & 12 & 2 \\\hline \mathrm{O}_2 & 16 & 2 \\\hline \mathrm{He}_2{ }^{2+} & 2 & 1 \\\hline\end{array}
So, $\mathrm{O}_2^{-}, \mathrm{N}_2$ and $\mathrm{O}_2^{+}$the sum of order is 8 it have maximum bond order.

Asked in: AP EAMCET 2024 (22 May Shift 1)

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