Question

In resonance hybrid of ozone molecule, O-O bond length is

• A. 128 pm
• B. 134.5 pm
• C. 121 pm
• D. 148 pm

Hint:

In molecules with resonance structures like ozone, bond lengths are an average of the possible bond types (single and double bonds).

Answer 1

The Correct Option is A

Step 1: Understanding Ozone's Bond Length.
In the resonance hybrid of the ozone (O\(_3\)) molecule, the bonding is delocalized, meaning that the O-O bonds are not identical but have an intermediate bond length between a single and a double bond. This gives an average bond length of 128 pm.

Step 2: Analyzing the options.
(A) 128 pm: Correct. The average O-O bond length in the resonance hybrid of ozone is 128 pm.
(B) 134.5 pm: Incorrect. This bond length is longer than the actual bond length in ozone.
(C) 121 pm: Incorrect. This bond length is shorter than the actual bond length in ozone.
(D) 148 pm: Incorrect. This bond length is much longer than the actual O-O bond length in ozone.

Step 3: Conclusion.
The correct bond length in the resonance hybrid of ozone is 128 pm, which corresponds to option (A).