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प्रश्न
Plaster of Paris should be stored in a moisture-proof container. Explain why?
उत्तर
The Plaster of Paris should be stored in a moisture-proof container, as it absorbs moisture and turns into hard substance (Gypsum) as shown in following chemical equation.
\[\ce{\underset{Plaster of Paris}{CaSO4. 1/2 H2O} + 3/2 H2O -> \underset{Gypsum}{CaSO4.}2H2O}\]
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.
What is the commercial name of calcium sulphate hemihydrate?
Name a calcium compound which hardens on wetting with water.
Fill in the following blank:
The chemical formula of plaster of Paris is ............
What will happen if heating is not controlled while preparing plaster of Paris?
Plaster of Paris has a remarkable property of setting into a hard mass on addition of water.
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.
Identify the compound X
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 compound X which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water.
For what purpose is it used in hospitals?
How many molecules of water of crystallisation (per formula unit) are present in:
gypsum?
At what temperature is gypsum heated to form Plaster of Paris?
How many water molecules does hydrated calcium sulphate contain?
______ is an important material in the construction industry.
Calcium sulphate hemihydrate is called as ______.
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:
Blackboard chalks: ______:: Plant growth: Epsum.
Analogy:
______: Calcium Sulphate Dihydrate:: Plaster of Paris: Calcium Sulphate Hemihvdrate.
