What property of conc. H₂SO₄

(i) is used in the action when sugar turns black in it's presence.

(ii) allows it to be used in the preparation of HCl and HNO₃ acids.

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 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.

(A) Dilute acid

(B) Dehydrating agent

(C) Non-volatile acid

(D) Oxidising agent

(i) $\text{CuSO}$4.5\text{H}2\text{O} \xrightarrow{\text{Conc. H}2 \text{SO}4} \text{CuSO}4 + 5\text{H}2\text{O}

(ii) S + 2H₂SO₄ [conc.] ⟶3SO₂ + 2H₂O

(iii) $\text{NaNO}_3 + \text{H}_2\text{SO}_4 [\text{conc.}]\xrightarrow{\lt 200 \degree\text{C}} \text{NaHSO}_\text{4} + \text{HNO}_\bold{3}$

(iv) MgO + H₂SO₄ ⟶ MgSO₄ + H₂O

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

Copy and complete the following table relating to an important industrial process and it's final output.