MCQ
Assertion $(A)$ : At constant temperature, $pV$ vs $V$ plot for real gases is not a straight line.
Reason $(R)$ : At high pressure all gases have $Z > 1$ but at intermediate pressure most gases have $Z < 1.$
  • $A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$
  • B
    $A$ and $R$ both are correct, but $R$ is not the correct explanation of $A$.
  • C
    $A$ is true but $R$ is false.
  • D
    $A$ and $R$ both are false.

Answer

Correct option: A.
$A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$
$PV$ versus $F$ plot is straight line for ideal gases but not for real gases.
At high pressure, there is positive deviation from ideal behavior $(Z < 1)$ but at intermediate or moderate pressure, the real gases pass negative deviation from ideal behavior $(Z < 1).$

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