Answer
a. Cycloalkene
b. Alkyne
c. Alkene
d. Alkyne
Work Step by Step
a. Cycloalkenes are Cyclic 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.
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. Note: The triple bond is not inside the cyclopentane part, therefore, this is not an cycloalkyne.