Question

19.Due to excess passing of CO2 through an aqueous solution of slaked lime, its milkiness fades because
A. Calcium carbonate is produced B. Calcium bi-carbonate is produced
C. Calcium oxide is produced D. Due to the production of more heat​

Answer 1

Answer:

B. Calcium bicarbonate is produced.

Explanation:

When excess of carbon dioxide is passed in lime water, calcium carbonate is converted to calcium bicarbonate which is soluble, hence the milkiness due to calcium carbonate disappears.

Answer 2

B. Calcium bi-carbonate is produced which fades milkiness.

• Passage of carbon dioxide through solution of slaked lime or lime water causes formation of calcium carbonate.
• Now, excess carbon dioxide reacts with this calcium carbonate and results in formation of calcium bicarbonate.
• Calcium bicarbonate has molecular formula Ca(HCO3)2. It is soluble in water and hence the milkiness fades due to its formation.