alleryWhen ethanoic acid reacts with sodium carbonate, which gas is produced as effervescence?
ACarbon dioxide
BHydrogen
CCarbon monoxide
DOxygen
Answer & Solution
Correct answer: A. Carbon dioxide
1. Ethanoic acid reacts with the basic salt sodium carbonate.
2. The products are sodium ethanoate, water and a gas.
3. The gas given off as effervescence is carbon dioxide.
4. It turns lime water milky, confirming carbon dioxide.
5. Rule out B: hydrogen is released with sodium metal, not with carbonates.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 9 "Carbon Compounds", p.139_
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