In Which of the Following Hydrocarbons is the Bond Angle

Question

In which of the following hydrocarbons is the bond angle about the carbon atom approximately 120°?
A) alkanes
B) alkenes
C) alkynes
D) none of these

Accepted Answer

In alkenes, the carbon-carbon double bond is a trigonal planar structure with approximately 120° bond angles. Alkanes and alkynes have tetrahedral and linear arrangements, respectively, with different bond angles.