A metal compound A commonly called limestone reacts with dilute
hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning
candle. Write a balanced chemical equation for the reaction if one of the compounds
formed is calcium chloride.
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Answer: When calcium carbonate reacts with hydrochloric acid, it produces carbon dioxide gas with effervescence. Carbon dioxide used as fire extinguisher. Hence, it extinguishes a burning candle. Therefore, the metal compound A is calcium carbonate.
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