MDCAT Chemistry MCQ #636

Dehydrohalogenation of 2-bromobutane with alcoholic KOH yields two alkenes. Which one is the major product according to the PTB syllabus?

MDCAT Chemistry MCQ #636

  1. Question 1

    Q1. Dehydrohalogenation of 2-bromobutane with alcoholic KOH yields two alkenes. Which one is the major product according to the PTB syllabus?

    • A) 2-Butene is the major product because it is more substituted.
    • B) 1-Butene is the major product because it is more stable.
    • C) An equal mixture of 1-butene and 2-butene is formed.
    • D) Butane is formed due to the reduction of the halide.

    Answer: 2-Butene is the major product because it is more substituted.

    Explanation: Saytzeff's rule states that the more highly substituted alkene (2-butene) is the major product over the less substituted one (1-butene).