For gases $W, X, Y$ and $Z$,the van der Waals constants are given below. Which gas has the highest critical temperature?
Gas$a$ (atm $L^2$ mol$^{-2}$)$b$ ($L$ mol$^{-1}$)
$W$$4.0$$0.027$
$X$$8.0$$0.030$
$Y$$6.0$$0.032$
$Z$$12.0$$0.027$

  • A
    $W$
  • B
    $X$
  • C
    $Y$
  • D
    $Z$

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