$A$ solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains:

Which acid is formed when sulfur dioxide reacts with water?

What happens when a glass rod dipped in concentrated hydrochloric acid is brought near a container filled with ammonia gas?

Write true or false for the following statements:
Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The water must always be added slowly to the acid with constant stirring.

Why should curd and sour substances not be kept in brass and copper vessels?

During the preparation of hydrogen chloride gas on a humid day,the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to