Question

Give balanced equations for the formation of sulphuric acid in acid rain, when’ a fossil fuel is burnt in an electric power station.

Answer 1

In electric power stations: When coal burns, S present in coal forms
SO₂ S + O₂ → SO₂
SO₂ as pollutant in air forms SO₃
2SO₂ + O₂ → 2SO₃
This SO₃ comes in contact with water vapour present in air to form H₂S0₄ and falls down as acid rain.