Question

Which gas is formed in above chemical reaction? b) If the gas is passed through lime water what change do you observe? c) Write down the chemical equation for the above reaction.​

Answer 1

Answer:

The Gas formed on heating limestone is Carbon dioxide. When this gas is passed through lime water, it forms Calcium Carbonate or limestone which turns milky.

Reaction for the above is-

When Limestone is heated,

CaCO

3

→CaO+CO

2

.

(limestone)

When Carbon Dioxide is passed through lime water,

CO

2

+Ca(OH)

2

→CaCO

3

↓+H₂O.

(lime water)

Reason :

When Carbon dioxide is passed through Lime water or Calcium Hydroxide, it turns milky due to the formation of the Precipitate of the insoluble milky Calcium Carbonate.