1.

Howis bleaching powder prepared ? Why does bleaching powder (i) Smell strongly of chlorine ? (ii) not dissolve completely in water ?

Answer»

Solution :Bleaching powder is prepared by the action of `Cl_(2)` on DRY SLAKED lime .
`Ca(OH)_2 + Cl_2 rarr CaOCl_2+H_2O`
Bleaching powder SMELLS strongly of chlorine because it is loosely bound to slaked lime. Carbon dioxide present in the air combines with bleaching powder leberating chlorine.
`CaOCl_(2) + CO_2 rarr CaCO_2 + Cl_2 uarr`
Bleaching powder reacts with water as under :
`CaOCl_(2) + CO_2 rarr Ca(OH)_2 + Cl_2`
`Ca(OH)_2 + underset("(Form air)")(CO_2) rarr underset("CARBONATE")underset("Calcium")(CaCO_3 + H_2O)`


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