Question

A white substance having a strong smell of chlorine is used to clean water in water storage . Identify th e substance write the chemichal name and the reaction for its preparation

Answer 1

The white substance that has a strong 'smell of chlorine' used to clean 'water' in water storage is bleaching powder.

EXPLANATION:

It is the chlorinated commercial product, also called as chlorinated lime or chlorine powder used to clean water storage tanks as a disinfectant which can deactivate the microorganisms present in water. It is also used to 'sanitize swimming' pool water.

Commercially, it is available as a mixture of calcium chloride, calcium carbonate, with about 25gm of chlorine/100 gm of bleaching powder. Extensive care should be taken as it has strong bleaching properties and chlorine gas is also poisonous.

The chemical name of 'bleaching powder': Calcium hypochlorite

The chemical formula is: $\mathrm{Ca}(\mathrm{ClO})_{2}$

Preparation of bleaching powder: It is prepared by the treating calcium hydroxide (slaked lime) with chlorine gas.

The equation for the reaction: $\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{Cl}_{2} \rightarrow \mathrm{CaOCl}_{2}+\mathrm{H}_{2} \mathrm{O}$

Answer 2

Answer:

It is beaching powder

It is also called calcium oxychloride

preparation-

Ca(OH)2+Cl2------->CaOCl2+H2O