Question Detail

CHM 102 Practice Questions Objective Question

Question

The C–C bond length in benzene is
Options
A greater than the C–C bond length in ethane.
B shorter than the C–C bond length in ethylene.
C Same as that of C–C bond length in ethylene.
D intermediate between C–C bond length in ethane and C–C bond length in ethylene.
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

The C-C bond length in benzene (1.39 Å) is intermediate between the C-C single bond in ethane (1.54 Å) and the C=C double bond in ethylene (1.34 Å). This is due to electron delocalization.

Hint

How does benzene's C-C bond length compare to single and double bonds?

Question Info