(a) Name the acid formed when sulphur dioxide dissolves in water.
(b) Name the gas released when sodium carbonate is added to a solution of sulphur dioxide.
Two gases found dissolved in natural water are
(a) oxygen and carbon dioxide
(b) hydrogen and oxygen
(c) sulphur dioxide and hydrogen
(d) chlorine and ammonia
Sulphur dioxide is dissolved in water. The solution is tested for acidic nature. What are the changes you will observe when you dip a litmus paper in the solution?