Question

statements given below are incorrect .write the correct statements

The dissolution of calcium oxide in water is an
example of Endothermic change​

Answer 1

Explanation:

Quick lime(CaO) combines with water to form calcium hydroxide(Ca(OH)

2

). It is an exothermic reaction as heat is produced in the reaction.

CaO+H

2

O→Ca(OH)

2

+heat

On adding excess of calcium hydroxide in water, a saturated solution of calcium hydroxide is formed which is called lime water. Lime water is basic in nature and therefore has a pH above 7.