Question

Select the hydrocarbon from the following which contains one C$\equiv$C triple bond and one C–C single bond:

• A. Ethyne
• B. Propyne
• C. Butyne
• D. Benzene

Hint:

To identify bonds in hydrocarbons, analyze the molecular structure for the presence of C–C and C$\equiv$C bonds.

Answer 1

The Correct Option is B

To determine which hydrocarbon contains one C$\equiv$C triple bond and one C–C single bond, we need to analyze the structure of each given hydrocarbon.

• Ethyne: Contains a single C$\equiv$C triple bond but no additional C–C single bond. Its structure is H–C$\equiv$C–H.
• Propyne: Comprises a C$\equiv$C triple bond and a C–C single bond. Its structure is CH₃–C$\equiv$C–H.
• Butyne: Contains a C$\equiv$C triple bond and multiple C–C single bonds, depending on the isomer, making it eligible but more complex than needed for this question.
• Benzene: Has no C$\equiv$C triple bonds; it is an aromatic compound with alternating single and double C–C bonds.

Therefore, the hydrocarbon that contains one C$\equiv$C triple bond and one C–C single bond is Propyne.