Question

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

Answer 1

$\huge\bf{Answer}$

$\to$ 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 lime stone is heated, calcium oxide and carbon dioxide are formed. This carbon dioxide gas is passed through freshly prepared lime water, insoluble calcium carbonate and water are formed. In this reaction, lime water turns milky.

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