(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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Solution

(a) Sodium carbonate or washing soda $(N a_{2} C O_{3})$ is used for softening hard water.
(b) Bleaching powder or calcium oxychloride $(C a O C l_{2})$ is used for disinfecting drinking water supply.
(c) Sodium carbonate, or washing soda $(N a_{2} C O_{3})$ , has a cleansing property.
(d) Bleaching powder, or calcium oxychloride $(C a O C l_{2})$ , is used for removing the colour of a coloured cloth.
(e) Plaster of Paris has a remarkable property of setting into a hard mass on the addition of water.
(f) Bleaching powder, or calcium oxychloride $(C a O C l_{2})$ , is obtained by the action of chlorine on solid (dry) slaked lime.

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Similar questions

(a) What is the common name of the compound $C a O C l_{2}$ ?

(b) Name the raw material used for the preparation of plaster of Paris.

(d) Explain why chlorine is used for sterilising drinking water supply.

Name the sodium compound which is used for softening hard water.

Q. Question 3
Name the sodium compound which is used for softening hard water.

A white powdery substance having a strong smell of chlorine is used for disinfecting drinking water supply at waterworks. Identify the substance. Give its chemical name and write the chemical reaction for its preparation.

Q. The sodium compound which is used for softening hard water:

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