Some properties of sulphuric acid are listed below. Choose the role played by sulphuric acid – A, B, C, or D which is responsible for the reactions (i) to (v). Some role/s may be repeated.

Column I
(A) Dilute acid

(B) Dehydrating agent

(C) Non-volatile acid

(D) Oxidising agent

Column II
(a) CuSO₄.5H₂O $\xrightarrow{\text{Conc. H}$2 \text{SO}4} CuSO₄ + 5H₂O

(b) S + 2H₂SO₄ [conc.] ⟶ 3SO₂ + 2H₂O

(c) NaNO₃ + H₂SO₄ [conc.] $\xrightarrow{\lt 200 \degree\text{C}}$ NaHSO₄ + HNO₃

(d) MgO + H₂SO₄ ⟶ MgSO₄ + H₂O

(e) Zn + 2H₂SO₄ [conc.] ⟶ ZnSO₄ + SO₂ + 2H₂O

Fill in the blanks. Choose from the following :
[oleum, two, three, acid, black, white, lead nitrate, ethene, sulphate, barium chloride solution, sulphur dioxide, normal]

(a) Sulphur can be oxidised to …………… by conc. sulphuric acid.

(b) Conc. sulphuric acid convert ethanol to …………… .

(c) Sulphate ion can be tested by …………… or …………… .

(d) Sulphur trioxide reacts with conc. sulphuric acid to form …………… .

(e) The basicity of sulphuric acid is …………… . It can form …………… salt and …………… salt.

(f) Metal sulphate solution gives …………… precipitate with …………… solution.

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