Question

Solution of substance x is used for whitewash what is the substance x

Answer 1

Answer:

Calcium oxide is used for white washing

Answer 2

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QUESTION : A solution of a substance 'X' is used for white washing.

(a) Name the substance 'X' and write its

formula.

(b) Write the reaction of the substance 'X' with water.

Ans. (a) 'X' = quicklime (calcium oxide), CaO

(b) When quicklime reacts with water, it forms slaked lime (calcium hydroxide) and also releases a large amount of heat.

CaO(s) + H2 O(l) → Ca(OH)2 (aq)

calcium water calcium hydroxide

oxide

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