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Question
You are given a test tube with two outlets and a bottle of lime water. Using same, how would you demonstrate experimentally the presence of carbon dioxide in air.
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Solution
Procedure:
- Take lime water in a test tube with two outlets ‘A’ and ‘B’ as shown above.
- Air is sucked slowly through the outlet ‘B’.
- Air moves in through end ‘A’ and passes through the lime water
Observation:
The line water in the test tube turns milky.
Conclusion:
Air which is sucked in from and ‘A’ contains carbon dioxide which turns the lime water milky. Hence, air contains – carbon dioxide.
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