Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved

CBSE Class 10 CBSE Class 10 Science
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1

Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. The gas C, when passed through lime water turns it milky. Identify A, B and C.

2

Salt A is sodium hydrogen carbonate (NaHCO3).

When sodium hydrogen carbonate is heated, it decomposes to give sodium carbonate (Na2CO3), water and carbon dioxide

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Hence, salt ‘B’ is sodium carbonate and the gas evolved ‘C’ is carbon dioxide. We know that, C02 when passed through lime water turns milky.