Choose reaction that does not require ZnCl3 catalyst:
Correct answer: D. D) Both B & C
- A. A) CH3CH2OH + HCl --> CH3CH2Cl + H2O
- B. B) CH3CH2OH + HBr --> CH3CH2Br + H2O
- C. C) CH3CH2OH + HI --> CH3CH2I + H2O
- D. D) Both B & C
Explanation
The correct answer is Option D The reaction of ethanol with HBr generally does not require a ZnCl2 catalyst because HBr is a more reactive acid than HCl. In contrast, the reaction with HCl typically needs the catalyst for the reaction to proceed efficiently, as seen in the Lucas test.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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About Alcohols
Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.
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