Assertion (A): At critical temperature,the su | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The critical temperature is defined as the temperature at which the distinction between the liquid and gas phases disappears,and the surface tensi

Vedclass · Accepted Answer

Both $A$ and $R$ are true and $R$ is a correct explanation for $A$.

Vedclass · Answer

(A) The critical temperature is defined as the temperature at which the distinction between the liquid and gas phases disappears,and the surface tension of the liquid becomes zero. Thus,Assertion $(A)$ is true.At the critical temperature,the density of the liquid and the gas phases become identical,and the intermolecular forces between the molecules in the liquid phase effectively vanish or become indistinguishable from those in the gas phase. This loss of cohesive force leads to the disappearance of surface tension. Therefore,Reason $(R)$ is true and provides the correct explanation for Assertion $(A)$.

Assertion $(A)$: At critical temperature,the surface tension of liquids becomes zero.
Reason $(R)$: At critical temperature,the intermolecular forces for liquids and gases become equal.

Similar Questions

On mixing salt in water,the surface tension of water will:

Consider a circular ring of radius $1.4 \,cm$ lying on the surface of a liquid. If a vertical force of $0.022 \,N$ greater than the weight of the ring is required to lift this ring from the liquid surface,then the surface tension of the liquid is (in $\,Nm^{-1}$)

$A$ small spherical droplet of density $d$ is floating exactly half immersed in a liquid of density $\rho$ and surface tension $T$. The radius of the droplet is (take note that the surface tension applies an upward force on the droplet).

Work of $3.0 \times 10^{-4} \, J$ is required to be done in increasing the size of a soap film from $10 \, cm \times 6 \, cm$ to $10 \, cm \times 11 \, cm$. The surface tension of the film is

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion $(A)$: At critical temperature,the surface tension of liquids becomes zero.Reason $(R)$: At critical temperature,the intermolecular forces for liquids and gases become equal.