Give balanced equations for the manufacture of sulphuric acid by the Contact process.

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

(a) Potassium nitrate

(b) Carbon

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

(1) $\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}

(2) S + 2H₂SO₄ [conc.] ⟶3SO₂ + 2H₂O

(3) $\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}

(4) MgO + H₂SO₄ ⟶ MgSO₄ + H₂O

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

Give balanced equation for the reaction : Zinc sulphide and dilute sulphuric acid.