Q.

The bond length of C=O bond in CO is 1.20Å and in CO2  it is 1.34Å. Then C=O bond length in CO32− will be

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a

1.50Å

b

1.34Å

c

1.29Å

d

0.95Å

answer is C.

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Detailed Solution

In CO32−, due to resonance, C=O bond length is in between triple and double bond, i.e. in between 1.2 and 1.34. Thus, answer is 1.29 Ao.
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The bond length of C=O bond in CO is 1.20Å and in CO2  it is 1.34Å. Then C=O bond length in CO32− will be