A substance 'X' is used in white washing and is obtained by heating limestone in the absence of air. Identify 'X'. *
1) Calcium Oxy Chloride
2) Calcium hydroxide
3) Calcium oxide
4) Calcium Carbonate
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Explanation:
calcium oxide
The chemical substance X used for whitewashing is Calcium oxide also known as quicklime or burnt lime or lime. Calcium oxide is an alkaline earth flux with the chemical formula CaO.
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