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Question

The lime water test is used to confirm the presence of _______ in the air we exhale.

A
oxygen
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B
carbon dioxide
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C
nitrogen
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D
water
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Solution

The correct option is B carbon dioxide
The lime water experiment is used to detect the presence of carbon dioxide in air.

When we exhale in a conical flask containing lime water, it turns milky. This is because lime water turns milky when carbon dioxide is exhaled in it.

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