alleryWhen ethanol is heated with concentrated sulphuric acid at 443 K, which product is formed?
AEthanoic acid
BEthane
CEthene
DAcetaldehyde
Answer & Solution
Correct answer: C. Ethene
1. Concentrated H₂SO₄ at 443 K removes a water molecule from ethanol, a dehydration reaction.
2. Oxidation would give ethanoic acid and passing vapour over hot copper would give acetaldehyde, so those are wrong.
3. Losing water from CH₃CH₂OH leaves CH₂=CH₂.
4. That product is ethene.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 11 "Carbon and its Compounds", p.171_
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