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(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 the 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. |
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Answer» (a) Sodium carbonate. (b) Bleaching powder. (c) Sodium carbonate. (d) Bleaching powder. (e) It sets into a hard mass on mixing with proper quantity of water. (f) Bleaching powder. |
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