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Question

Match the species in Column I with the corresponding properties in Column II.

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Solution

(A) SO2+Ca(OH)2CaSO3+H2O
When SO2 gas is passed through or over limewater, it turns milky due to the formation of calcium sulphite.
(B) SO2 is responsible for acid rain as These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
(C) CO2+Ca(OH)2CaCO3+H2O
Due to formation of calcium carbonate lime water turns milky in presence of CO2.
CO2 is a primary green house gas. It dissolves in blood and control its pH.
(D,E,F) Cl2,Br2 and O3, turn KI/starch blue as chlorine releases iodine from the potassium iodide this iodine reacts with starch to produce the blue- black coloration.
Chlorination by Cl2 and ozonation by O3 are used for disinfection of drinking water.

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