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AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure

Arrange the following molecules according to decreasing order of their \(\mathrm{O}-\mathrm{O}\) bond lengths.

  1. A \(\mathrm{O}_3>\mathrm{H}_2 \mathrm{O}_2>\mathrm{O}_2\)
  2. B \(\mathrm{H}_2 \mathrm{O}_2>\mathrm{O}_3>\mathrm{O}_2\)
  3. C \(\mathrm{O}_2>\mathrm{H}_2 \mathrm{O}_2>\mathrm{O}_3\)
  4. D \(\mathrm{O}_2>\mathrm{O}_3>\mathrm{H}_2 \mathrm{O}_2\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\mathrm{H}_2 \mathrm{O}_2>\mathrm{O}_3>\mathrm{O}_2\)

Step-by-step Solution

Detailed explanation

\(\mathrm{H}_2 \mathrm{O}_2\) has only single bond with bond length \(1.41 Å\), \(\mathrm{O}_2\) has double bond with bond length \(1.33 Å\). \(\mathrm{O}_3\) has a partial double bond due to resonance of lone pairs of electrons. So, correct order is…