1.

A solution of a substance X is used for whitewashing. (1) Name the substance .X. and write its formula. (2) Write the reaction of the substance X named in (1) above with water.

Answer»

Solution :(1) Substance X is calcium oxide. Its FORMULA is CaO.
(2) Calcium oxide reacts vigorously with water and forms slaked lime (`Ca(OH)_(2)`) and liberates large AMOUNT of heat. It is an exothermic reaction.
`CaO(s) + H_(2)O(1) to Ca(OH)(2)(aq) + "Heat"`


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