Question

A compound of a calcium reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle; turns lime water milky. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
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Answer 1

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.

Answer 2

$\huge\bf\red{Question\::}$

A compound of a calcium reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle; turns lime water milky. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

$\huge\bf\orange{Answer\::}$

$\footnotesize\sf\bold{\:CaCO_3 \: + \:2HCl\:\longrightarrow\:CaCl_2 \: + \: CO_2\:\uparrow \: + \:H_2 O}$