Question

White wash was being done at mukesh's house. Mukesh saw that the painter added quick lime to drum having water. Mukesh touched outer surface of drum, it is unbelievably hot. (a) write the chemical equation for above reaction. (b) what type of reaction is it? (c) what is utility of this reaction?

Answer 1

Explanation:

CaO+H2O→Can(OH)2+ heat

it is combination reaction

the reaction is used in whitewashing

Answer 2

(a). Calcium oxide when treated with the water , forms calcium hydroxide .

     CaO + H$_{2}$O => Ca(OH)$_{2}$

(b). This reaction is a type of exothermic combination reaction . This reaction generates a large amount of heat energy with sound .

(c). The product calcium hydroxide is used for white washing of the house .

• Calcium hydroxide is used in the manufacturing of cement and plasters .