Chemistry Chemical Bonding and Molecular Structure Karnataka - CET Previous Year Question Single Correct MCQ
Published on: August 13, 2026

Which one of these is not true for benzene?

A
It forms only one type of monosubstituted product.
B
There are three carbon-carbon single bonds and three carbon-carbon double bonds.
C
The heat of hydrogenation of benzene is less than the theoretical value.
D
The bond angle between the carbon carbon bonds is .

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Text Solution

Verified by Experts
The correct answer is:
B

: Resonance gives each bond in benzene some double bond character and this has been confirmed by measuring bond length between two adjacent carbon atoms in various compounds of benzene. The bond length ( bond as in ethane) is and (double bond as in ethene) is . The carbon to carbon bond length in benzene has been found to be which lies between single and double bond length values.

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