Question

Sulphur dioxide is one of the components of polluted air, SO₂ is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO₂ is ______.

Options

• \[\ce{2SO2 + O2 -> 2SO3}\]

• \[\ce{SO2 + O3 -> SO3 + O3}\]

• \[\ce{SO2 + H2O2 -> H2SO4}\]

• \[\ce{2SO2 + O2 + 2H2O -> 2H2SO4}\]

Answer 1

Sulphur dioxide is one of the components of polluted air, SO₂ is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO₂ is \[\underline{\ce{2SO2 + O2 + 2H2O -> 2H2SO4}}\].

Explanation:

Sulphur dioxide and Sulphur trioxide react with water to form H₂SO₄ which causes acid rain.

\[\ce{S + O2 -> SO2}\]

\[\ce{2SO2 + O2 -> 2SO3}\]

\[\ce{SO3 + H2O -> H2SO4}\]