Question

$\mathrm{CaO}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{Ca}{\left(\mathrm{OH}\right)}_2$ is an example of………….?

Answer 1

The reaction of quick lime(CaO) with water to form lime water $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$is an example of a combination reaction and the nature of the reaction is exothermic

Combination reaction: The reaction in which two or more than two substances combine to form one single substance is called a combination reaction.

$\mathrm{X}+\mathrm{Y}\to \mathrm{XY}$

For example:

$\mathrm{Cao}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{Ca}{\left(\mathrm{OH}\right)}_2+\mathrm{Heat}$

Exothermic reaction: The reaction which releases heat after a reaction is called an exothermic reaction. As we can see in the above reaction the heat released in a reaction that's why the nature of reaction is exothermic.