Give balanced chemical equations for the following.

(a) Calcium bicarbonate reacts with dilute hydrochloric acid.

(b) Ferric hydroxide with nitric acid.

(c) Zinc nitrate with ammonium hydroxide

The following questions relate to mole concept.

(a) the volume of 320 g of SO₂ at STP.

(Atomic mass of S = 32 and O = 16)

(b) the mass of 10²² atoms of sulphur.

[Atomic mass : S = 32 and O = 16, Avogadro's number (N_A) = 6.022 x 10²³]

The following questions are pertaining to the laboratory preparation of hydrochloric acid.

(a) Name the reactants used during the laboratory preparation of hydrochloric acid.

(b) Give suitable reason for choosing the reactants for laboratory preparation.

(c) Write balanced chemical equation for the reaction taking place below 200°C.

Give reasons

(a) Liquid ammonia is used as a refrigerant in ice plants.

(b) Only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.

(c) A piece of wood becomes black when concentrated sulphuric acid is poured on it.