Question

Three equations are given below. After studying it, write about Acid rain. 

(1) CO₂ (g) + H₂O(l) → 2H+ (aq) + CO₃^2- (aq) 

(2) 2SO₂ (g) + O₂(g) +2H₂O(l) → 2H₂SO₄ (aq) 

(3) 4NO₂ (g) + O₂(g) + 2H₂O(l) → 2HNO₃(aq)

Answer 1

Oxides of Sulphur and Nitrogen, mist of HCI and Phosphoric acid, etc. present in polluted air dissolve in rain water making it more acidic. This is known as acidic rain. SO₂ and NO₂ present in polluted air are the major contributors of acid rain.

2SO₂ (g) + O₂(g) +2H₂O(l) → 2H₂SO₄ (aq) 

4NO₂ (g) + O₂(g) + 2H₂O(l) → 2HNO₃(aq)