question_answer

The size of\[C-C\]  bond in benzene is:

A)  \[1.54\overset{\text{o}}{\mathop{\text{A}}}\,\]            

B)         \[1.39\overset{\text{o}}{\mathop{\text{A}}}\,\]            

C)         \[1.22\overset{\text{o}}{\mathop{\text{A}}}\,\]          

D)         \[1.21\overset{\text{o}}{\mathop{\text{A}}}\,\]

Correct Answer: B

Solution :

It has been found by X-rays study that all \[C-C\] bond in benzene are equivalent with bond length 139 pm, which is intermediate between \[C-C\] (154pm) and\[C-C\] (134pm)