(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.
(a) Sodium carbonate or washing soda is used for softening hard water.
(b) Bleaching powder is a calcium compound that is used for disinfecting the drinking water supply.
(c) Sodium carbonate is a metal compound that has detergent and cleansing properties.
(d) Bleaching powder or calcium oxychloride ( CaOCl2) is used for removing the colour.
(e) Plaster of Paris has a property of setting into a hard mass on the addition of water.
(f) Bleaching powder or calcium oxychloride ( CaOCl2) is obtained by the action of chlorine on solid slaked lime.
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- Name the sodium compound, which is used, for softening hard water.
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- Name a calcium compound which hardens on wetting with water?
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- Name a sodium compound which is a constituent of many dry soap powders?
- During electrolysis of brine, a gas ‘G’ is liberated at anode. When this gas ‘G’ is passed through slaked lime, a compound ‘C’ is formed, which is used for disinfecting drinking water.(i) Write formula of ‘G’ and ‘C’.(ii) State the chemical equation involved.(iii) What is common name of compound ‘C’? Give its chemical name.
- (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?
- 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.
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- 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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