Molecular Theory & Factors

In most liquids, with rise in temperature surface tension of liquid

A liquid is at rest in a container. In a sphere of influence, the liquid molecule at its centre is

Which of the following is NOT TRUE?

a. When soluble substance is dissolved in water, the surface tension of water increases. b. When sparingly soluble substance is mixed with water, surface tension of water increases. c. When insoluble impurity is added into the water, surface tension of water decreases. d. In case of molten copper or molten cadmium, the surface tension increases with increase in its temperature.

Consider following statements:

A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface, of a liquid.

B. As the temperature of liquid rises, the coefficient of viscosity increases.

C. As the temperature of gas increases, the coefficient of viscosity increases

D. The onset of turbulence is determined by Reynold's number.

E. In a steady flow two stream lines never intersect.

Choose the correct answer from the options given below:

On the surface of the liquid in equilibrium, molecules of the liquid possess

In most liquids, with rise in temperature, surface tension of a liquid

It is easier to spray water to which soap is added because addition of soap to water

The potential energy of a molecule on the surface of a liquid compared to the molecules inside the liquid is

At critical temperature, the surface tension of liquid is

The frequency ($\nu$) of an oscillating liquid drop may depend upon radius ($r$) of the drop, density ($\rho$) of liquid and the surface tension (s) of the liquid as $\nu = r^{a}\rho^{b}s^{c}$. The values of a, b and c respectively are

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Clothes containing oil or grease stains cannot be cleaned by water wash. Reason (R): Because the angle of contact between the oil/grease and water is obtuse. In the light of the above statements, choose the correct answer from the option given below.

The surface tension of most of the liquid decreases with rise in

An ice cube of edge $1\text{ cm}$ melts in a gravity free container. The approximate surface area of water formed is (water is in the form of spherical drop)

A molecule of water on the surface experiences a net

Which one of the following statement is correct?