Question Detail
Question
What is the molecular formula of a cyclic alkyne with 5 carbons (e.g., cyclopentyne)?
Correct Answer
Option C is the correct answer.
Detailed Explanation
One ring + one triple bond = two degrees of unsaturation from the triple bond plus one from the ring (total 3) → formula CnH₂n-4 = C₅H₆.
Hint
Each ring or π bond removes two hydrogens.