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JEE · NEET Previous Year Question

$The carbon-carbon bond length in benzene is$

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

A $same as in C_{2} H_{4}$
B $in between C_{2} H_{6} and C_{2} H_{2}$
C $in between C_{2} H_{4} and C_{2} H_{2}$
D $in between C_{2} H_{6} and C_{2} H_{4} .$

Correct answer: D

Solution

(d) : In benzene, due to delocalisation of π -electrons, all the C - C bond lengths are equal as each C - C bond has some double bond character and thus the bond length is between single and double bond, i.e., between C_{2} H_{6} and C_{2} H_{4} .

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