Question

Which of the following reactions depict the
oxidising behaviour of H₂SO₄ :
(a) 2PCl₅+ H₂SO₄ ⟶
2POCl₃ + 2HCl + SO₂Cl₂
(b) 2NaOH + H₂SO₄ ⟶ Na₂SO₄ + H₂O
(c) NaCl + H₂SO₄ ⟶ NaHSO₄ + HCl
(d) 2HI + H₂SO₄ ⟶ I₂ + SO₂ + 2H₂O

Answer 1

Answer:

option (d) is the answer.

Answer 2

(d) 2HI + H₂SO₄ ----> I₂ + SO₂ + 2H₂O

Explanation:

2HI + H₂SO₄ ----> I₂ + SO₂ + 2H₂O

2Hi ----> I2

In this reaction, oxidation number of I increases by one. So it is an oxidation reaction. HI is the reducing agent.

H2SO4 ----> SO2

In this reaction, oxidation number of S decreases by two. So it is a reduction reaction. H2SO4 is the oxidising agent.

Option D is the answer.