It is easier to liquify ammonia than oxy...

It is easier to liquify ammonia than oxygen because

A

it is easier to compress oxygen than `NH_3`

B

`NH_3` has a very low critical temperature as compared to `O_2`

C

`O_2` has higher value of Van der Waal's constant a and higher critical temperature than `NH_3`

D

`NH_3` has a higher value of Van der Waals constant a and critical temperature than oxygen

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The correct Answer is:

D

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