Which of the following functional groups contains a triple bond $\equiv$?

• A. Alkyne $\equiv$
• B. Alcohol
• C. Ether
• D. Alkene $=$

Answer: (A)

Verified step by step guidance

1. Understand that the question asks which functional group contains a triple bond, represented by the symbol \(\equiv\).
2. Recall the common types of carbon-carbon bonds in organic chemistry: single bonds (alkanes), double bonds (alkenes), and triple bonds (alkynes).
3. Identify that an alkyne is characterized by a carbon-carbon triple bond, which is denoted as \(\mathrm{C} \equiv \mathrm{C}\).
4. Recognize that alcohols contain an \(\mathrm{-OH}\) group, ethers contain an \(\mathrm{-O-}\) linkage between carbons, and alkenes contain a carbon-carbon double bond (\(\mathrm{C} = \mathrm{C}\)), not a triple bond.
5. Conclude that the functional group with a triple bond \(\equiv\) is the alkyne.