Surface Tension

The surface tension of liquid decreases with a rise in

• viscosity of the liquid

• temperature of the liquid

• diameter of container

• thickness of container

The rain drops are in spherical shape due to

• viscosity

• thrust on drop

• surface tension

• residual pressure

Dimensional formula of surface tension is

• [MLT].

• [MT-2].

• [M0T-2].

• [ML2T-2].

Surface tension of a liquid is .......... the area of the liquid surface

The surface tension of a liquid is T. The increase in its energy on increasing the area of its surface by amount A is

• TA

• T²A

• T

• T²A²

The surface tension of a soap solution is 0.03N/m.The work done to produce a soap bubble of radius 0.05m is

• 1.6 x 10^-3 J

• 2.6 x 10^-3 J

• 1.6 x 10^-6 J

• 1.88 x 10^-3 J

A square wire frame of size L is dipped in a liquid. On taking out, a ,embrane is formed. If the surface tension of liquid is T, force acting on the entire frame will be

• 2TL

• 4TL

• 8TL

• 10TL

The force required to seperate two glass plates of area

10^-2m² with a film of water 0.05mm thickness between them is (surface tension of water is 70 x 10^-3N/m)

• 25N

• 20N

• 14N

• 28N

8 mercury drops coalesce to form 1 mercury drop, the energy changes by a factor of

• 1

• 2

• 4

• 6

The force of attraction between the molecules of the same substance is called as

• adhesive force

• force of surface tension

• cohesive force

• electrostatic force