Which of the following are arranged in an increasing order of their bond strengths ?

Which of the following are arranged in an increasing order of their bond strengths ?
  1. $\mathrm{O}_2^{-} < \mathrm{O}_2 < \mathrm{O}_2^{+} < \mathrm{O}_2^{2-}$
  2. $\mathrm{O}_2^{2-} < \mathrm{O}_2^{-} < \mathrm{O}_2 < \mathrm{O}_2^{+}$
  3. $\mathrm{O}_2^{-} < \mathrm{O}_2^{2-} < \mathrm{O}_2 < \mathrm{O}_2^{+}$
  4. $\mathrm{O}_2^{+} < \mathrm{O}_2 < \mathrm{O}_2^{-} < \mathrm{O}_2^{2-}$

Solution

According to bond order values the given order is the answer. Bond order values are $+1,+1 \frac{1}{2},+2$ and $+2 \frac{1}{2}$, higher bond order means stronger bond.

Asked in: JEE Main 2002

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