6. Which of the following reagent is used to identify the evolution of carbon dioxide gas during the chemical reaction?
(a) Limewater
(b) Hydrochloric acid
(c) Copper sulphate
(d) Sodium hydroxide
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(a) Calcium chloride test
(a) Calcium chloride testOxalate salts react with calcium chloride to form white precipitate of calcium oxalate. In this test, the pink colour of potassium permanganate is decolourised with the evolution of carbon dioxide gas.
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Answer:
Limewater is used to identify the evolution of carbon dioxide gas during the chemical reaction.
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