JEE Main & Advanced
Chemistry
GOC
Question Bank
Dipole moment, Resonance and reaction intermediates
question_answer
All bonds in benzene are equal due to [Roorkee 1990; KCET 1998]
A)Tautomerism
B)Inductive effect
C)Resonance
D)Isomerism
Correct Answer:
C
Solution :
All the bonds \[(C-C)\] are equal in benzene. The \[C-C\] bond length is \[1.39\text{{ }\!\!\mathrm{\AA}\!\!\text{ }}\] which is in between \[C-C\] bond \[\underset{\begin{matrix} {} \\ \begin{smallmatrix} \text{1, 2, 3-Trimethyl} \\ \text{benzene} \end{smallmatrix} \\ \end{matrix}}{\mathop{\begin{matrix} C{{H}_{3}} \\ {} \\ {} \\ \end{matrix}\,\,\,\,}}\,\] and \[C=C\] \[(1.34\text{{ }\!\!\mathrm{\AA}\!\!\text{ }})\].