Fewpal
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A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula. (ii) Write the reaction of the substance ‘X’ named in (i) above with water.

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(i). The substance ‘X’ is calcium oxide. Its chemical formula is CaO. 

(ii). Calcium oxide reacts vigorously with water to form calcium hydroxide (slaked lime)

CaO+H2O → Ca(OH)2

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