(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 of broken limbs in hospitals?
(d) Explain why chlorine is used for sterilising drinking water supply.

(a) Name the starting material used in the industrial preparation of phenol. (b) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium. (c) Explain why Lewis acid is not required in bromination of phenol ?

(a). What is the chemical name of bleaching powder.? (b) What is the chemcial formula of bleaching powder? (c) What are the materials used for the preparation of bleaching powder? (d) State one use of bleaching powder (other than bleaching).

(a). What is meant by saying that the metals are malleable ad ductile? Explain with examples. (b). Name two metals which are both malleable and ductile. (c). Which property of iron metal is utilised in producing iron sheets required for making buckets? (d). Which property of copper metal is utilised in making thin wires

(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.

(a) What is a solar cell ? Draw the labelled diagram of a solar cell. (b) Name the semi-conductor material which is usually used for making solar cells. (c ) Write the uses of solar cells.

What is the chemical formula for plaster of Paris ? How is it prepared ? State the common and the chemical names of the compound formed when plaster of Paris is mixed with water.

Consider the following substances: NaCl,Ca(OH)_(2),NaHCO_(3),NH_(3),Na_(2)CO_(3),H_(2)O,Cl_(2),CO_(2),CaSO_(4).2H_(2)O,2CaSO_(4).H_(2)O,CaOCl_(2) (a). Which two substances combine to form beaching 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?