Given below are two statements : Statement (I): Experimentally determined oxygen-oxygen bond lengths in the…

Given below are two statements :
Statement (I): Experimentally determined oxygen-oxygen bond lengths in the $\mathrm{O}_3$ are found to be same and the bond length is greater than that of a $\mathrm{O}=\mathrm{O}$ (double bond) but less than that of a single $(O-O)$ bond.
Statement (II) : The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond $(\mathrm{O}=\mathrm{O})$ but more than that of a single bond $(\mathrm{O}-\mathrm{O})$.
In the light of the above statements, choose the correct answer from the options given below :
  1. Both Statement I and Statement II are false
  2. Statement I is false but Statement II is true
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are true

Solution


Bond length $\propto \frac{1}{\text { Bond order }}$
Order of $\mathrm{O}-\mathrm{O}$ bond length
$\mathrm{O}=\mathrm{O} < \mathrm{O}_3 < \mathrm{O}-\mathrm{O}$
$\therefore$ Statement $I$ is true.
Lone pair-lone pair repulsion between O-atoms is not solely responsible for the correct order of O-O bond length. Bond order also should be considered.
$\therefore \quad$ Statement II is false.

Asked in: JEE Main 2025 (24 Jan Shift 2)

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