Question

How will you test the presence of carbon dioxide in exhaled air ?​

Answer 1

Answer:

there are 2 methods to do so

Explanation:

1) find out the presence of CO2 by blowing a lot candle

2) blow the exhaled air to a solution of quick line, if the solution turns white, it means there is CO2 in the exhaled air.

Answer 2

We will test the presence of carbon dioxide in exhaled air by the following method:

• Using lime water is an easy way to test for the existence of carbon dioxide. The exhaled carbon dioxide is used to generate a deposition of calcium carbonate with lime water.
• Calcium hydroxide (the chemical name for limewater) reacts with carbon dioxide in the exhaled air to form calcium carbonate that is insoluble in water and thus features a milky white precipitate.

Aim:

• To show the existence of Carbon dioxide in the air.

Apparatus:

• Lime water is placed in a test tube which is delivered by two outlets A and B

Procedure:

• Air is sucked gradually from outlet B.

Observation:

• The lime water in the test tube whirls milky.

Conclusion:

• On sucking air from outlet B, the atmospheric air is authorized to enter through inlet A which further ratifies into the lime water. Accordingly, the atmospheric air comprises Carbon dioxide which responds with lime water and twists it milky.

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