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Question
Name a calcium compound which hardens on wetting with water.
Solution
Calcium sulphate hemihydrate, popularly known as plaster of Paris, is a calcium compound that hardens on wetting with water. Its formula is`CaSO_4. 1/2H_2O.`
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RELATED QUESTIONS
What is the commercial name of calcium sulphate hemihydrate?
Plaster of Paris has a remarkable property of setting into a hard mass on addition of water.
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Match the Following:
| 1. | Antiseptic | a. | Plaster of paris |
| 2. | Making casts for statues | b. | Phenol |
| 3. | Ease stress and relaxes | c. | Gypsum |
| 4. | Fertilizers | d. | Epsum |
Analogy:
______: Calcium Sulphate Dihydrate:: Plaster of Paris: Calcium Sulphate Hemihvdrate.
