Question

Gas 'X' is prepared by treating sodium sulfite with dilute sulfuric acid. When gas 'X' is oxidised by dioxygen in presence of vanadium (V) oxide, gas 'Y' is formed. Identify X and Y.

Options

• H₂S, SO₂

• SO₂, SO₃

• SO₃, SO₂

• H₂S, SO₃

Answer 1

SO₂, SO₃

Explanation:

\[\ce{Na2SO3_{(s)} + H2SO4_{(aq)} -> Na2SO4_{(aq)} + H2O_{(l)} + SO2_{(g)}}\]

\[\ce{2SO2_{(g)} + O2_{(g)} ->[V2O5] 2SO3_{(g)}}\]