The potential energy of a molecule on the surface of liquid compared to one inside the liquid is  -
(a) Zero                                             (b) Smaller
(c) The same                                      (d) Greater

Concept Questions :-

Surface tension

Difficulty Level:

Two droplets merge with each other and forms a large droplet. In this process

(a) Energy is liberated

(b) Energy is absorbed

(c) Neither liberated nor absorbed

(d) Some mass is converted into energy

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Radius of a soap bubble is 'r', surface tension of soap solution is T. Then without increasing the temperature, how much energy will be needed to double its radius

(a) $4{\mathrm{\pi r}}^{2}\mathrm{T}$                        (b) $2{\mathrm{\pi r}}^{2}\mathrm{T}$

(c) $12{\mathrm{\pi r}}^{2}\mathrm{T}$                       (d) $24{\mathrm{\pi r}}^{2}\mathrm{T}$

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Work done in splitting a drop of water of 1 mm radius into ${10}^{6}$ droplets is (Surface tension of water )

(a)                   (b)

(c)                    (d)

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

(a) $4\mathrm{\pi }\left({\mathrm{D}}^{2}-{\mathrm{d}}^{2}\right)\mathrm{T}$                     (b) $8\mathrm{\pi }\left({\mathrm{D}}^{2}-{\mathrm{d}}^{2}\right)\mathrm{T}$

(c) $\mathrm{\pi }\left({\mathrm{D}}^{2}-{\mathrm{d}}^{2}\right)\mathrm{T}$                        (d) $2\mathrm{\pi }\left({\mathrm{D}}^{2}-{\mathrm{d}}^{2}\right)\mathrm{T}$

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A spherical drop of oil of radius 1 cm is broken into 1000 droplets of equal radii. If the surface tension of oil is 50 dynes/cm, the work done is
(a) 18 ergs                     (b) 180 ergs
(c) 1800 ergs                  (d) 8000 ergs

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

(a) $2{\mathrm{\pi R}}^{2}\mathrm{T}$                        (b) $3{\mathrm{\pi R}}^{2}\mathrm{T}$

(c) $4{\mathrm{\pi R}}^{2}\mathrm{T}$                         (d) $2{\mathrm{\pi RT}}^{2}$

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The radius of a soap bubble is increased from $\frac{1}{\sqrt{\mathrm{\pi }}}$cm to $\frac{2}{\sqrt{\mathrm{\pi }}}$ cm. If the surface tension of water is 30 dynes per cm, then the work done will be

(a) 180 ergs                          (b) 360 ergs

(c) 720 ergs                          (d) 960 ergs

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If work W is done in blowing a bubble of radius R from a soap solution, then the work done in blowing a bubble of radius 2R from the same solution is

(a) W/2                    (b) 2W

(c) 4W                     (d) $2\frac{1}{3}\mathrm{W}$

Concept Questions :-

Surface tension
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If the surface tension of a liquid is T, the gain in surface energy for an increase in liquid surface by A is

(a) ${\mathrm{AT}}^{-1}$                       (b) $\mathrm{AT}$

(c) ${\mathrm{A}}^{2}\mathrm{T}$                         (d) ${\mathrm{A}}^{2}{\mathrm{T}}^{2}$

Concept Questions :-

Surface tension