(a) What is the common name of the compound CaOCl2?(b) Name the raw material used for the preparation of plaster of Paris.
(c) Which property of plaster of Paris is utilised in making casts for broken limbs in hospitals?
(d) Explain why chlorine is used for sterilising drinking water supply.
(a) Bleaching powder is the common name of the compound CaOCl2
(b) Gypsum is used for the preparation of plaster of Paris.
(c) Plaster of Paris has the property of setting into hard mass on getting wet.
(d) Chlorine is the best for sterilizing drinking water supply because it kills all the bacteria and germs present in the water. It acts as a disinfectant.
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- (a) What is plaster of Paris? Write the chemical formula for plaster of Paris.(b) How is plaster of Paris prepared? Write chemical equation of the reaction involved. (c) Explain why plaster of Paris should be stored in a moisture-proof container. (d) Write two important uses of plaster of Paris.
- (a) Name a sodium compound used for softening hard water.(b) Which compound of calcium is used for disinfecting drinking water supply? (c) Name a metal compound which has detergent properties (cleansing properties). (d) Name one compound of calcium which is used for removing colour of a coloured cloth. (e) State a peculiar (or remarkable) property of plaster of Paris. (f) Name the substance obtained by the action of chlorine on solid (dry) slaked lime.
- What is the chemical formula for plaster of Paris? How is it prepared? State the common and the chemical names of the compound formed when plaster of Paris is mixed with water.
- What is the chemical formula of Plaster Of Paris and why it is known as plaster of paris?
- What is Plaster of Paris?
- What is the common name of the compound CaOCl2?
- (a) What will happen if heating is not controlled while preparing Plaster of Paris?(b) Write an equation to show the reaction between Plaster of Paris and water.
- State the common and chemical names of the compounds formed when plaster of paris is mixed with water.
- Name the raw material used for production of caustic soda.
- Name the material which is used for making the heating element of an electric iron.
- Name the sodium compound, which is used, for softening hard water.
- The chemical formula for plaster of Paris is :(a) CaSO4. 2 H2O (b) CaSO4. H2O (c) CaSO4 . 1/2 H2O (d) 2CaSO4. H2O
- The chemical formula for plaster of Paris is :(a) CaSO4. 2 H2O (b) CaSO4 . H2O(c) CaSO4. 1/2H2O (d) 2 CaSO4 . H2O
- (a) What is gypsum ? What happens when gypsum is heated to 100℃ (373K)?(b) Name a sodium compound which is used for making borax and glass. (c) Name the compound which is used in hospitals for setting fractured bones. (d) Which is the real bleaching powder agent in the bleaching powder?
- Consider the following substances :NaCl , Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2 (a) Which two substances combine to form bleaching powder? (b) Which four substances are utilised in the production of washing soda? (c) Which compound represents plaster of Paris? (d) Which compound is a part of baking powder? (e) Which compound is used as an antacid?
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