Taking into account of hybridization and resonance effect, rank the following bonds in order of decreasing bond length.
A
I>II=III
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B
II>III>I
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C
I>III>II
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D
II=III=I
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Solution
The correct option is DII=III=I Taking resonance into consideration, all the bonds have partial double bond character. As seen by resonance, all the C−O bonds are identical and have the same bond length. ∴II=III=I[ order of bond length ]