The critical constants of a gas are

A $T_{c}$ , $P_{c}$ and $V_{c}$
B $a$ , $b$ and $R$
C $T_{B}$ , $T_{i}$ and $T_{c}$
D $Z$ , $P$ and $V$

Answer: A

The critical temperature, critical pressure and critical molar volume define the critical point of a substance. They can be related to the van der Waals constants

a

and

b

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