(a) How chloride of lime chemically differs from calcium chloride? (b) What happens when chloride of lime reacts with sulphuric acid? Write the chemical equation involved. (c) Mention two uses of chloride of lime.
(a) The chemical formula of calcium chloride is CaCl2. The chemical formula of lime water is Ca(OH)2.
If the lime water reacts with chlorine, it forms CaOCl2, i.e., bleaching powder (chloride of lime).
Hence, the chemical formula, chemical properties and physical properties of both are different.
(b) When chloride of lime (CaOCl2) reacts with sulphuric acid, it gives calcium sulphate and calcium chloride. The reaction is:
CaOCl2 + H2SO4→ CaSO4 + CaCl2
(c) Two uses of chloride of lime (bleaching powder) are:
i. It is used to disinfect water and kill germs present in the water.
ii. It is also used for bleaching dirty clothes in the laundry.
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