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Question

Which among the following molecules has the shortest CH bond length?

A
Ethane
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B
Ethene
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C
Ethyne
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D
All of the above have equal CH bond lengths
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Solution

The correct option is C Ethyne
Greater the s character, shorter the bond length. Hence, ethane with sp3 hybridization has the longest bond length and ethyne with sp hybridization has the shortest bond length.

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