A white powder having an odour of chlorine is used to remove yellowness of which cloths in laundries. Name this powder, how is the prepared? Write the chemical reaction involved in its preparation?

Give the laboratory preparation of sulphur dioxide and write the chemical reaction involved .

How will you prepare polymer dacron? Give its chemical reaction.

What is bleaching powder? How its prepared? How does its react with CO_2 ?

How will you prepare amines from the following? Write their chemical reactions: R-X

Identify the compound of calcium which is yellowish white powder and is used for disinfecting drinking water. Write its chemical name and formula. How is it manufactured? Write the chemical equation for the reaction involved. Also list two other uses of the compound.

How is bleaching powder prepared? Give its uses.

Sodium salt of which acid will be needed for the preparation of propane. write chemical equation for the reaction?

What is freon ? How is it prepared from C Cl_4 ? Write its one use.

Write chemical reaction involved in the preparation of Benzene Diazonium chloride from aniline.