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Question
Describe simple experiments to show the presence of -
carbon dioxide in air using a test tube with outlets containing lime water.
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Solution
Carbon dioxide in air:
Apparatus- A test tube containing lime water with two outlets ‘A’ and ‘B’.
Procedure -Air is sucked slowly from the outlet ‘B’ as shown above.
Observation - The lime water in the test tube turns milky.
Conclusion - Air which is sucked in from end ‘A’, passes through the lime water and contains carbon dioxide which turns lime water milky [This is a test for carbon dioxide gas].
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