Assertion :Oxygen is collected by the downward displacement of water and not over air. Reason: Downward displacement of water is used to collect oxygen. Any gas be collected by this method and the gas pushes the water down as it is lighter and do not react with water.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Downward displacement of water is used to collect oxygen. Any gas be collected by this method and the gas pushes the water down as it is lighter and do not react with water.

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