Subjective Type

(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.

Solution

(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.

SIMILAR QUESTIONS

Acids, Bases and Salts

Name a calcium compound which hardens on wetting with water.

Acids, Bases and Salts

Fill in the following blanks: (a) Common salt is obtained from sea-water by the process of ........... (b) Rock salt is mined just like ...................... (c) Chemical formula of washing soda is .................. (d) Sodium hydrogen carbonate is .................. soda whereas sodium carbonate is ................. soda. (e) The chemical formula of plaster of Paris is ............

Acids, Bases and Salts

(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.

Acids, Bases and Salts

(a) What is gypsum? What happens when gypsum is heated to $$100^0C$$ (373 K)? (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 agent present in bleaching powder?

Acids, Bases and Salts

(a) What is the common name of the compound $$CaOCl_2$$? (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.

Acids, Bases and Salts

(a) What is plaster of Paris? Write the chemical formula of 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) State two important uses of plaster of Paris.

Acids, Bases and Salts

A compound X which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. (a) Identify the compound X. (b) Write the chemical equation for its preparation. (c) For what purpose is it used in hospitals?

Acids, Bases and Salts

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.

Acids, Bases and Salts

What is the commercial name of calcium sulphate hemihydrate?

Acids, Bases and Salts

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound. Write the chemical equation for its preparation. For what purpose is it used in hospitals.

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