alleryThe compound formed when ethanol undergoes complete combustion is
ACarbon dioxide + water
BCarbon monoxide + water
COnly water
DOnly carbon dioxide
Answer & Solution
Correct answer: A. Carbon dioxide + water
1. Complete combustion of an alcohol requires sufficient oxygen.
2. Ethanol + oxygen → CO₂ + H₂O + energy.
3. Balanced: CH₃CH₂OH + 3 O₂ → 2 CO₂ + 3 H₂O.
4. Incomplete combustion (limited O₂) may give CO plus soot.
_Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.2.4_
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