Answer
a. This is an alkene.
b. This is an alkyne.
c. This is an alkene.
d. This is an cycloalkene
Work Step by Step
a. and c. Alkenes are Straight-chain hydrocarbons with exactly one double bond in the main chain.
b. Alkynes are Straight-chain hydrocarbons with exactly one triple bond in the main chain.
d. Cycloalkenes are Cyclic hydrocarbons with exactly one double bonds in the main chain.