Assertion (A): Impurity of arsenic oxide must be removed before passing the mixture of SO₂ and air through the catalytic chamber.

Reason (R): Arsenic oxide poisons the catalyst.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Concentrated sulphuric acid is kept in air tight bottles.

Reason (R): Air contains impurities, therefore H₂SO₄ will get spoiled.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Match the following :

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:

Column I

a. Typical acid

b. Dehydrating agent

c. Non-volatile acid

d. Oxidising agent

Column II

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

(ii) NaCl + H₂SO₄ ⟶ NaHSO₄ + HCl

(iii) CuO + H₂SO₄ ⟶ CuSO₄ + H₂O

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

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