alleryStart learning →A metal carbonate reacting with a dilute acid gives a salt, water and
Ahydrogen gas
Boxygen gas
Ccarbon dioxide
Dammonia
Answer & Solution
Correct answer: C. carbon dioxide
1. Metal carbonate + acid → salt + water + carbon dioxide.
2. The gas **carbon dioxide** turns lime water milky, confirming CO₂.
3. e.g. Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch2 'Acids, Bases and Salts', §2.2_
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