JEE Main Chemistry question

Which one of these is not true for benzene? [K CET 2010]

(A)It forms only one type of monosubstituted product
(B)There are three carbon–carbon single bonds and three carbon–carbon double bondsCorrect
(C)The heat of hydrogenation of benzene is less than the theoretical value
(D)The bond angle between the carbon–carbon bonds is 120°

Answer: (B)

Solution

Benzene's resonance delocalisation means all six C–C bonds are equivalent (bond order 1.5, bond length 1.39 Å, intermediate between a single and double bond) — benzene is not a simple alternating-single/double-bond (Kekulé) structure, so

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-142263