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The two O-O bond lengths in ozone molecu...

The two O-O bond lengths in ozone molecule are equal. Assign reason.

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Ozone may be regareded as a resonance hybrid of the two resonating structures. Because of resonance, both the O-O bond lengths have partial double bond character. In other words, both the O-O bond lengths are equal (128 pm) and lie in between those O = O double bond length of 121 pm and O-O single bond length of 148 pm.
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