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The gas that liquefies first, when coole...

The gas that liquefies first, when cooled from 500K to its critical temperature given in parenthesis is

A

`O_2 ( 154.3 K)`

B

`NH_3 (405.5 K)`

C

`CO_2 ( 304.1 K)`

D

`N_2 (126.0K)`

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The correct Answer is:
B
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