The `H-C=C ( or C=C-H)` bond angle in ethane is

Options

A. `120^(@)`
B. `118^(@)`
C. `180^(@)`
D. `121^(@)`

Answer

D

Explanation

The `C=C-H` bonds angle in ethene is somewhat larger `(121^(@))` than the `H-C-H` bonds angle `(118^(@))` because the `e^(-)`-pair in the `C-H` bonds is repelled more by the two pairs of electrons in the `C=C` bond than by the single pair of electrons in the other `C-H` bond.