JEE Chemistry 2025 Question with Solution

Given: Two statements about bond lengths in $O_2$ and ozone are to be checked.

Find: Which option correctly identifies the truth values of Statement I and Statement II.

From the solution text:

• Statement I is true: the oxygen-oxygen bond length is intermediate between a single $O-O$ bond and a double $O=O$ bond.
• Statement II is also true: in ozone, lone pair-lone pair repulsion affects the bond length, making it different from pure single and double bond values.

Therefore, both Statement I and Statement II are true.

The correct option is D.

Given: Two statements discuss experimentally observed oxygen-oxygen bond lengths and their explanation.

Find: Decide whether each statement is true or false.

Step 1: Check Statement I. The solution states that the oxygen-oxygen bond length is greater than that of a double bond $O=O$ but less than that of a single bond $O-O$. Hence, Statement I is true.

Step 2: Check Statement II. The solution states that in ozone, lone pair-lone pair repulsion affects the bond length, giving a value longer than a pure double bond and shorter than a pure single bond. Hence, Statement II is true.

Step 3: Match with the options. The option saying both statements are true is option D.

Therefore, the correct option is D.