A white coloured substance (B)which is obtained from a white hard natural substance (A) is mixed with calculated amount of water which result in the formation of aqua solution of another white substance (C) which when applied on the walls forms a shiny white layer of (A) with time by a action of the atmospheric gases find A,B and C
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Explanation:
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Answer: B---is (CaOH)2 also called slaked lime or sodium hydroxide
A---- CaCO3 called Calcium Carbonate
C---- CaO called calcium Oxide
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