Question

What do you observe when:
(h) quick lime is dissolved in water

Answer 1

When a quicklime (CaO) is dissolved in water($H_{2}O$), heat is released and slacked lime [${Ca\left(OH\right)}_2$] is formed. It is a chemical change. It can be shown by chemically as, $CaO$ + $H_2$→ ${Ca\left(OH\right)}_2$ + Heat