Question

Name the gas which can turn lime water milky . Name the process by which salt is purified.
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Answer 1

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Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.

Answer 2

ANSWER :

Carbon dioxide turns lime water milky. Therefore; Salt A is sodium bicarbonate and used as baking powder. Salt B is sodium carbonate, which is used to remove the hardness of water.

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