Question

In ethene, the bond angles are exactly:

• A. 109 ${}^o$ 28'
• B. 120${}^o$
• C. 180${}^o$
• D. 90${}^o$

Answer 1

The correct option is B 120${}^o$

The $H-C-H$ bond angle is ${117}^0$, which is very close to the ideal ${120}^0$ of a carbon with sp2 hybridization. The other two angles $(H-C=C)$ are both ${121.5}^0$.