Question

When the gas formed on heating limestone is passed through freshly prepared lime water turns milky. Because.​

Answer 1

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$\to$ When Carbon Dioxide is passed through lime water or Calcium Hydroxide it turns milky due to the formation of precipitate of the insoluble milky Calcium Carbonate..

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Answer 2

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When Carbon Dioxide is passed through lime water or Calcium Hydroxide it turns milky due to the formation of precipitate of the insoluble milky Calcium Carbonate.