What is the main organic product when bromoethane is heated with alcoholic potassium hydroxide?
Correct answer B. Ethene
Explanation
Alcoholic KOH acts as a base and removes HBr from bromoethane by elimination (dehydrohalogenation): CH₃CH₂Br + KOH → CH₂=CH₂ + KBr + H₂O. Aqueous KOH would instead give ethanol by substitution.
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