1.

Match the statements in Column A, with those in Column B.Column AColumn B1. Largest constituent of air, which dilutes the activity of oxygen.(a) Oxygen2. A gas used for filling weather observation balloons.(b)  Carbonic acid3. An acid formed by the dissolution of sulphur dioxide gas in water.(c) Sulphuric acid4. An acid formed by the dissolution of carbon dioxide in water.(d) Helium5. A gas vital for respiration.(e) Nitrogen

Answer»
Column AColumn B
1. Largest constituent of air, which dilutes the activity of oxygen.(e) Nitrogen
2. A gas used for filling weather observation balloons.(d) Helium
3. An acid formed by the dissolution of sulphur dioxide gas in water.(c) Sulphuric acid
4. An acid formed by the dissolution of carbon dioxide in water.(b)  Carbonic acid
5. A gas vital for respiration.(a) Oxygen



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