The gas which we breath out precipitates ______ into milky white.

Sodium Chloride solution

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Calcium Carbonate solution

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Potassium Permanganate solution

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Potassium Bicarbonate solution

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Solution

The correct option is B Calcium Carbonate solution
The gas which we exhale or breath out is carbon-dioxide.
When this gas passes through calcium carbonate solution there occurs precipitation reaction between the solution, as a result, the color of the solution turns to milky white.
When CO $_{2}$ is passed through lime water which is a diluted solution of Ca(OH)_2, it turns milky due to the formation of calcium carbonate $C a C O_{3}$ .

So the option B is correct.

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