Question

During the process of white washing, substance A which is white in colour is slowly added to water, forming substance

B. More water is added to B, the solution of B is applied to the walls. B reacts with one of the atmospheric gas C and forms

a bright white layer of substance D on the wall.






a) Name the compound A and D


b) Write the balanced chemical reaction for conversion of substance B to D


c) Name the type of reaction for conversion of substance A to B


d) Name the common name for substance B.​

Answer 1

Answer:

True

The chemical name of substance, which is used for white washing is calcium oxide. Its common name is lime or quick lime. The chemical formula of calcium oxide is CaO.

When calcium oxide reacts with water it forms calcium hydroxide. Calcium hydroxide is also known as slaked lime.

Calciumoxide

CaO(s) + WaterH 2 O(l→ CalciumhydroxideCa(OH)2 (aq)

Answer 2

Answer:

(1The solution of the substance used for whitewashing is calcium oxide also called quicklime with chemical formula CaO.