When air is blown from mouth into a test tube containing lime water the lime water turns milky due to _________.

Oxygen

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Carbon di-oxide

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Nitrogen

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Water Vapour

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Solution

The correct option is B Carbon di-oxide
B. Carbon di-oxide
Reason: The exhaled air from mouth contain higher amount of carbon di-oxide compared to the air inhaled. This carbon di-oxide reacts with the lime water (Calcium hydroxide) to produce Calcium carbonate ( $C a C O_{3}$ ) that is insoluble in water. This insoluble compound provides the milky appearance to the solution. So the correct option is B.

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Similar questions

When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of :
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

Question 11
When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of

(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of:

When air is blown from the mouth into a test-tube containing limewater, the limewater turns milky due to the presence of $C O_{2}$ . What is the component formed as a product of the reaction that turns the solution milky?

Statement 1- Lime water turns milky when air is passed through the solution.

Statement 2- Air contains carbon dioxide which turns lime water milky.

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