Q10 of 270 Page 96

Name a calcium compound which hardens on wetting with water.

Plaster of Paris is a white powder and on mixing with water, it changes to gypsum, a hard solid mass.


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What is the commercial name of calcium sulphatehemihydrate?

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Name the product formed when CI2 and H2produced during the electrolysis of brine are made to combine.

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Name a sodium compound which is a constituent of many dry soap powders.

 12

Name a metal carbonate which is soluble in water.