A. \(\mathrm{C}_5 \mathrm{H}_8\) B. \(\mathrm{C}_{10} \mathrm{H}_{21}\) C. \(\mathrm{C}_8 \mathrm{H}_{16}\) D. \(\mathrm{C}_5 \mathrm{H}_{12}\)
Correct Answer: A
Explanation
- An alkyne must conform to the general molecular formula \(\mathrm{C}_n \mathrm{H}_{2 n-2}\). Thus, the only alkyne here is \(\mathrm{C}_5 \mathrm{H}_8\) - The respective molecular formulae of alkenes and alkanes are \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}}\) and \(\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}+2}\)
