Question

7
What happens when excess of carbon dioxide gas is passed through lime wale!!
A) Lime water first turns milky and then colorless
B) Lime water turns bluish
C) Lime water turns milky
D) Lime water turns blackish

Answer 1

Answer:

lime water first turn milky and then colourless

please mark as brilliant

Answer 2

Answer:

The answer is (A). First the lime water turns milky and after passing more CO$_{2}$, it become colorless.

Explanation:

When CO$_{2}$ is passed from lime water [ CaO (aq.)] it turns milky due to the formation of Calcium Carbonate( CaCO$_{3}$ ) which precipitate out in water. If the excess of CO$_{2}$ is passed through the calcium carbonate it turns colourless due to the formation of Calcium Bicarbonate [Ca(HCO$_{3}$)$_{2}$ ] which is soluble in water.