Assertion (A) : At critical temperature liquid passes into gaseou… - Vidyadip

MCQ

Assertion $(A)$ : At critical temperature liquid passes into gaseous state imperceptibly and continuously.
Reason $(R)$ : The density of liquid and gaseous phase is equal to critical temperature.

✓
$A$ 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 $A.$

At critical state, surface tension of liquid is zero hence liquid passes into gaseous state imperceptibility and continuously . At this stage, the liquid and vapor phase becomes equal.

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