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MDCAT Chemistry QUESTION #7803
Question 1

Dehydrohalogenation of an alkyl halide is typically carried out with:

  • Alcoholic KOH✔️
  • Aqueous KOH
  • Conc. H₂SO₄
  • Zn dust
Correct Answer Explanation

Alcoholic KOH (strong base in ethanol) promotes E2 elimination to form alkenes. Aqueous KOH favors substitution; conc. H₂SO₄ can cause elimination but also other reactions; Zn dust is for dehalogenation (vicinal dihalides).