an element a reacts with water to form compound B which is used in whitewashing the compound be on strong heating forms an oxide see which on treatment with water gives back b identify a b and c and give the reactions involved
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Element A is calcium (Ca). When it reacts with water, it forms calcium hydroxide. Thus, compound B is calcium hydroxide [Ca(OH)2], which is used in white washing.
Compound B on heating gives CaO.
Thus, C is calcium oxide (CaO).
C(CaO) on treatment with water gives back B [Ca(OH)2].
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Element a is quick lime(calcium oxide), when mixes with water forms com.b (calcium hydroxide) on heating forms calcium oxide
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