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 compounds formed is calcium chloride.

The metal compound A reacts with dilute hydrochloric acid to produce a gas that extinguishes a burning candle. The formation of calcium chloride is also mentioned. Based on this information, the balanced chemical equation for the reaction can be written as follows:

Metal compound A + 2HCl → CaCl₂ + Gas

Keep in mind that the actual metal in compound A is not specified, so you might need more specific information to determine the exact balanced equation. If you know the metal in compound A, you can replace “Metal compound A” with the specific metal symbol.