The Van der Waals parameters for gases $W$,$X$,$Y$,and $Z$ are given below. Which one of these gases 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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