1. What is the common name of the compound CaOC12? 2. Name the sodium compound which is used for softening hard water. 3. Write an equation to show the reaction between plaster of Paris and water. 4. What is a neutralisation reaction? Give two examples. 5. What are strong and weak acids? In the following list of acids, separate strong acid and weak acids; Hydrochloric acid, citric acid , acetic acid and nitric acid.
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(a) Sodium carbonate is used for softening hard water.
(b) Bleaching powder is the compound of calcium is used for disinfecting drinking water supply.
(c) Sodium carbonate is a metal compound that has detergent properties.
(d) Bleaching powder is one compound of calcium that is used for removing the colour of coloured cloth.
(e) It sets into a hard mass on mixing with proper quantity of water.
(f) The substance obtained by the action of chlorine on solid slaked lime is Bleaching powder.
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