Statement (I): Experimentally determined oxygen–oxygen bond lengths in O₃ are found to be same and the bond length is greater than that of an O = 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 (O = O) but more than that of a single bond (O

Bond Length in Ozone | JEE Main PYQ | Chemical Bonding

Given below are two statements :

Statement (I): Experimentally determined oxygen–oxygen bond lengths in O₃ are found to be same and the bond length is greater than that of an O = 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 (O = O) but more than that of a single bond (O–O).

In the light of the above statements, choose the correct answer:

(A) Statement I is false but Statement II is true

(B) Both Statement I and Statement II are true

(D) Both Statement I and Statement II are false

Correct Answer: Statement I is true but Statement II is false

Explanation

In ozone (O₃), both O–O bond lengths are equal due to resonance. Each bond has a bond order of 1.5, so the bond length lies between single and double bond lengths.

The reason is resonance and delocalization of π-electrons, not solely lone pair–lone pair repulsion. Hence Statement II is false.

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JEE Main Chapter-wise PYQs – Chemistry