Question

When a colourless gas is passed through bromine water it decolorise, The gas is:-

Options

• SO₂

• HBr

• HCI

• H₂S

Answer 1

SO₂ 

Explanation:

\[\ce{SO2 + H2O + (0) -> \underset{Colourlers}{H2SO4}}\]

\[\ce{Brze + H2O -> \underset{Colourless}{2HBr + (O)}}\]