Question

a metal compound A reacts with dilute hydrochloric acid to produce effervescence ​

Answer 1

Metal compound A is CaCO3

The Gas evolved is CO2

The gas thus formed is an effervescent carbon dioxide gas when calcium carbonate reacts with hydrochloric acid. The carbon dioxide gas also acts as an extinguisher for fires. Hence, the burning candle is extinguished. The metal compound A, therefore, constitutes calcium carbonate.

The balanced equation of the reaction is

CaCO3 + 2HCl → CaCl2 + CO2 + H2O

Answer 2

Answer:

Calcium carbonate

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.Metal compound A is CaCO3

The Gas evolved is CO2

The gas thus formed is an effervescent carbon dioxide gas when calcium carbonate reacts with hydrochloric acid. The carbon dioxide gas also acts as an extinguisher for fires. Hence, the burning candle is extinguished. The metal compound A, therefore, constitutes calcium carbonate.

The balanced equation of the reaction is

CaCO3 + 2HCl → CaCl2 + CO2 + H2O

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