Question

State whether the given statement is true or false:

A solution of a substance $X$ is used for white washing. The reaction of the substance $X$ is with water is:

$\underset{Calciumoxide}{CaO\left(s\right)}+\underset{Water}{H_{2}O\left(l\right)}\to \underset{Calciumhydroxide}{Ca\left(OH{)}_2\right(aq)}$

• A. True
• B. False

Answer 1

The correct option is A 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.

$\underset{Calciumoxide}{CaO\left(s\right)}+\underset{Water}{H_{2}O\left(l\right)}\to \underset{Calciumhydroxide}{Ca\left(OH{)}_2\right(aq)}$