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An element A reacts with water to form a compound B which is used in white washing.

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An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms and oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.

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(A) Calcium

(B) Calcium hydroxide

(C) Calcium oxide

(a) Ca + 2H2O → Ca(OH)2 + H2(g)

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