6.A substance used in white washing. i)Name this substance and write its chemical formula. ii)Write the reaction of this substance with water.
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(i) Substance X is Calcium Oxide whose solution we use in water which is used for white washing. The formula of substance X is Cao. (ii) Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat
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Ans. i. The substance whose solution is water is used for white washing is calcium oxide. Its formula is CaO.
ii. CaO(s) + H2O(l) Ca(OH)2(aq)
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