Acids Bases and Salts In-text Solution

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.

Why a reaction of a metal with acid liberates gases. And how do we detect them?

Why we do not keep curd and sour substances in Brass container.

Identify Distilled water, an acidic solution and a basic solution using Red litmus paper.