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प्रश्न
Name the product obtained when Plaster of Paris is mixed with water. State the use of the product. Give two uses of POP.
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उत्तर
The chemical formula of Plaster of Paris (POP) is CaSO4.½H2O. Gypsum (CaSO4.2H2O) is formed on mixing POP with water as follows:
CaSO4.½H2O + 1½ H2O → CaSO4.2H2O
Uses of POP:-
- In hospitals, as plaster for supporting fractured bones in the right position.
- For making decorative materials and for making wall surfaces smooth.
- As a fire-proofing material.
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संबंधित प्रश्न
Write an equation to show the reaction between Plaster of Paris and water.
Plaster of Paris should be stored in a moisture-proof container. Explain why?
Name a calcium compound which hardens on wetting with water.
Fill in the following blank:
The chemical formula of plaster of Paris is ............
Name the raw material used for the preparation of plaster of Paris.
State two important use of plaster of Paris.
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
Consider the following substances:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which compound represents plaster of Paris?
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
A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.
How many molecules of water of crystallisation (per formula unit) are present in:
gypsum?
How are detergents manufactured?
How many water molecules does hydrated calcium sulphate contain?
______ is an important material in the construction industry.
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.
