Assertion: The O-O bond length in ozone is identical with that in molecular oxygen. Reason: The ozone molecule is a resonance hybrid of two canonical structures.

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If Assertion is INCORRECT but Reason is CORRECT. Explanation: The assertion is incorrect because the O-O bond length in ozone (127.8 pm) is not the same as in molecular oxygen (121 pm). However, the reason is correct; ozone is a resonance hybrid of two canonical structures, which explains why both O-O bonds in ozone are equal in length and intermediate between a single and double bond.

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