Question Detail
Question
What is the product when propyne (CH3C≡CH) reacts with one equivalent of HBr?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Addition follows Markovnikov's rule: H adds to less substituted carbon (terminal), Br adds to more substituted carbon, giving 2-bromopropene (CH3CBr=CH2).
Hint
Markovnikov addition across one π bond.