Assertion :On cooling, ammonia liquifies first whereas $C O_{2}$ requires more cooling. Reason: Critical temperatures of ammonia and carbon dioxide are $405.5 K$ and $304.10 K$ respectively.

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
$Critical temperature : - ---------------------- -$
The temperature at or above which vapor of the substance can't liquified, no matter how much pressure is applied.
$e . g -$ $N H_{3} - 405.5 K C O_{2} - 304.10 K$
$⟹$ On cooling, ammonia liquifies first whereas $C O_{2}$ requires more cooling as it has law critical temperature.

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