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Question

Assertion :On cooling, ammonia liquifies first whereas CO2 requires more cooling. Reason: Critical temperatures of ammonia and carbon dioxide are 405.5 K and 304.10 K respectively.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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 NH3405.5KCO2304.10K
On cooling, ammonia liquifies first whereas CO2 requires more cooling as it has law critical temperature.

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