State your observation when:
Dilute hydrochloric acid is added to lead nitrate and the mixture is heated. 

State your observation when: Dilute hydrochloric acid is added to MnO_2

State your observation when: Dilute hydrochloric acid is added to copper carbonate.

State your observations when hydrochloric acid is added to zinc nitrate solution

Write the balanced chemical equation for the following: (1) Action of Hydrochloric acid on sodium bicarbonate. (2) Identify the gas evolved and give the chemical test in each of the following cases : Dilute Hydrochloric acid is added to Lead nitrate solution and the mixture is heated.

State your observations when : Dilute hydrochloric acid reacts with sodium sulphite.

dilute hydrochloric acid is added to zinc hydroxide.

State what is observed when hydrochloric acid is added to silver nitrate solution.

State your observations when : Dilute hydrochloric acid reacts with iron (II) sulphide.

Give your observation : Dilute nitric acid is added to copper oxide.

Give your observation : Dilute nitric acid is added to iron sulphide.