Question

Cyclic hydrocarbon ${}^{\prime }{A}^{\prime }$ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than $1.54A^{\circ }$, but more than $1.34A^{\circ }$. The bond angle will be

• A. ${109}^{\circ }{28}^{\prime }$
• B. ${100}^{\circ }$
• C. ${180}^{\circ }$
• D. ${120}^{\circ }$

Answer 1

The correct option is D ${120}^{\circ }$

All the properties mentioned in the question suggest that is a benzene molecule. Since in benzene all carbons are $s{p}^2-$ hybridized. therefore. $C-C-C\text{angle is}{120}^{\circ }.$