Name :

(a) The acid formed when sulphur dioxide dissolves in water.

(b) The gas released when sodium carbonate is added to a solution of sulphur dioxide.

(c) Liquid E can be dehydrated to produce ethene.

(d) The gas that can be oxidized to sulphur.

(e) The solution which liberates sulphur dioxide gas from sodium sulphite.

(f) The gas produced on reaction of dilute sulphuric acid with a metallic sulphide.

(g) A dilute mineral acid which forms a white precipitate when treated with barium chloride solution.

(h) The acid which produces sugar charcoal from sugar.

(i) The acid on mixing with lead nitrate solution produces white ppt. which is insoluble even on heating.

What is the name given to the salts of:

(a) Sulphurous acid

(b) Sulphuric acid

State the property of sulphuric acid shown by the reaction of conc. sulphuric acid when heated with

(i) Potassium nitrate

(ii) Carbon

(iii) ethanol

Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v). Some properties may be repeated:

A. Typical acid

B. Dehydrating agent

C. Non-volatile acid

D. Oxidising agent

(i) C₁₂H₂₂O₁₁ + nH₂SO₄ ⟶ 12C + 11H₂O + nH₂SO₄

(ii) S + 2H₂SO₄ ⟶ 3SO₂ + 2H₂O

(iii) NaCl + H₂SO₄ ⟶ NaHSO₄ + HCl

(iv) CuO + H₂SO₄ ⟶ CuSO₄ + H₂O

(v) Na₂CO₃ + H₂SO₄ ⟶ Na₂SO₄ + H₂O + CO₂