Question

Co2 passed through lime water turns milky and on passing excess co2 turns colourless

Answer 1

Answer:

When the excess carbon dioxide gas is passed through the lime water, it turns milky first due to the formation of the calcium carbonate as a precipitate which is insoluble in water and then become colorless due to the formation of calcium bicarbonate.

Answer 2

Answer:

 : When the excess carbon dioxide gas is passed through the lime water, it turns milky first due to the formation of the calcium carbonate as a precipitate which is insoluble in water and then become colorless due to the formation of calcium bicarbonate.