alleryWhen ethanol is heated with concentrated H₂SO₄ at 443 K, it undergoes
ACombustion
BDehydration to form ethene
CFermentation to form CO₂
DEsterification
Answer & Solution
Correct answer: B. Dehydration to form ethene
1. Concentrated H₂SO₄ acts as a strong dehydrating agent.
2. At 443 K it removes water from ethanol.
3. CH₃CH₂OH → CH₂=CH₂ (ethene) + H₂O.
4. So ethanol is dehydrated to ethene under these conditions.
_Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.2.4_
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