Organic Chemistry Some Basic Principles and Techniques - Result Question 26
####30. Cyclic hydrocarbon ’ $A$ ’ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than $1.54 \AA$, but more than $1.34 \AA$. The $C-C-C$ bond angle will be
(a) $109^{\circ} 28^{\prime}$
(b) $100^{\circ}$
(c) $180^{\circ}$
(d) $120^{\circ}$
[1989]
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Solution:
- (d) All the properties mentioned in the question suggest that it is a benzene molecule. Since in benzene all carbons are $s p^{2}-$ hybridized, therefore, $C-C-C$ angle is $120^{\circ}$
