Metal compound A 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 compound formed is calcium chloride. In this question why can't the answer be Sodium hydrogen carbonate?
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Explanation:
sodium hydrogen carbonate can not be the answer as the salt produced is calcium chloride. which is formed only when one constituent is calcium, but in case of NaHCO3, calcium salt is not produced and the reaction becomes wrong
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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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