NCERT In-text 2.1 — Q3 - Acids, Bases and Salts
Question: Metal compound A reacts with dilute HCl to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced equation if one product is calcium chloride.
Answer: CaCO3(s) + 2HCl(aq) — CaCl2(aq) + H2O(l) + CO2(g)
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