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Question

Chemistry Question on Bond Parameters

The CHC-H bond distance is the longest in

A

C2H2C _{2} H _{2}

B

C2H4C _{2} H _{4}

C

C2H4Br2C _{2} H _{4} Br _{2}

D

C6H6C _{6} H _{6}

Answer

C2H4Br2C _{2} H _{4} Br _{2}

Explanation

Solution

As the ss-character or number of π\pi-electrons increases, bond length decreases. Therefore, C2H4Br2C _{2} H _{4} Br _{2} due to the absence of π\pi-electrons or due to the presence of lesser ss-character (25%)(25 \%), has the longest CHC - H bond distance.