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प्रश्न
What is plaster of Paris? Write the chemical formula of plaster of Paris.
उत्तर
Plaster of Paris is calcium sulphate hemi-hydrate (calcium sulphate half hydrate). The chemical formula of plaster of Paris is CaSO4.1/2H2O.
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संबंधित प्रश्न
Name the product obtained when Plaster of Paris is mixed with water. State the use of the product. Give two uses of POP.
Write an equation to show the reaction between Plaster of Paris and water.
Name a calcium compound which hardens on wetting with water.
Fill in the following blank:
The chemical formula of plaster of Paris is ............
How is plaster of Parish prepared? Write chemical equation of the reaction involved.
Plaster of Paris is prepared by heating one of the following to a temperature of 100°C. This is:
(a) CaSO3.2H2O
(b) CaCl2.2H2O
(c) CaCO3.2H2O
(d) CaSO4.2H2O
A compound X which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water.
Write the chemical equation for its preparation
How many molecules of water of crystallisation (per formula unit) are present in:
gypsum?
______ is used in making blackboard chalks.
Analogy:
Blackboard chalks: ______:: Plant growth: Epsum.
