Assertion :Air dissolved in water contains a lower percentage of oxygen than contained in air Reason: The solubility of oxygen in water is $33$ %

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 D Both Assertion and Reason are incorrect
Due to smaller size of oxygen molecules, it gets trapped inside the vacant space present in $H_{2} O$ , providing it higher solubility in water. Since solubility of oxygen in water is higher than that of nitrogen and other gases present in air, air dissolved in water contains a higher percentage of oxygen than contained in air. The solubility of gases in liquids depends on temperature. Hence, both the statements are incorrect

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Assertion :Air dissolved in water contains a lower percentage of oxygen than contained in air Reason: The solubility of oxygen in water is 33%

Assertion :Air dissolved in water contains a lower percentage of oxygen than contained in air Reason: The solubility of oxygen in water is $33$ %