MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
What forms when an aqueous solution of KOH is added to ethyl iodide?
Think it through first, then pick an option.
- a ethanal
- b ethene
- c ethanol
- d ethyne
Answer and explanation
Correct answer: c ethanol
An alkyl halide gives an alcohol with aqueous NaOH or KOH: ethyl iodide gives ethanol.
Why the other options are wrong
- a ethanal: Ethanal comes from oxidising ethanol; an alkyl halide with aqueous alkali gives the alcohol, ethanol.
- b ethene: Ethene forms with alcoholic alkali; in aqueous solution ethanol forms.
- d ethyne: Ethyne comes from water on CaC₂; here ethanol forms.
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