Which of the following compounds contains a triple bond?

• A. $\mathrm{CH}{3}_3\mathrm{COOH}$
• B. $\mathrm{CH}{3}_3\mathrm{CH}{2}_2\mathrm{OH}$
• C. $\mathrm{CH}{C}_2\mathrm{CH}{\mathrm{CH}}_3$
• D. $\mathrm{CH}{2}_2\mathrm{CH}{2}_2$

Answer: (C)

Verified step by step guidance

1. Identify the types of bonds present in each compound by analyzing their molecular formulas and common functional groups.
2. Recall that a triple bond in organic chemistry typically occurs between two carbon atoms and is represented as C\equiv C.
3. Examine the first compound, CH\subscript{3}COOH (acetic acid), which contains a carboxylic acid group; this group has single and double bonds but no triple bonds.
4. Look at the second compound, CH\subscript{3}CH\subscript{2}OH (ethanol), which contains only single bonds between carbon and hydrogen or oxygen atoms, so no triple bonds here.
5. Check the third and fourth compounds for the presence of a carbon-carbon triple bond (alkyne group), which is indicated by a C\equiv C bond; the compound with this feature contains the triple bond.