Question

1. A solution of a substance X is used for whitewashing.
(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:

I) The substance 'X' which is used in white washing is calcium oxide and its formula is CaO.

ii) The chemical substance X which is used for whitewashing is Calcium oxide also known as quicklime or burnt lime or lime. The formula of substance X is CaO. It is a white or greyish white solid produced in large quantities by roasting calcium carbonate so as to drive off carbon dioxide.

Answer 2

Answer:

Write the reaction of the substance X named in (1) above with water. Answer: (1) 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).