Question

1.
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.​

Answer 1

Answer:

calcium oxide or lime calcium oxide

Answer 2

{i}The substance whose solution in water we use for white-washing is calcium oxide (lime, choona). So, the substance X is calcium oxide. Its formula is CaO.

{ii}The solution of the substance used for whitewashing is calcium oxide also called quicklime with chemical formula CaO. ... CaO (s) + H2O (l) → Ca(OH)2(aq).

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