The surface tension of a soap solution is . To blow a bubble of radius 1 cm, the work done is

(a)                         (b)

(c)                        (d)

Concept Questions :-

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

Difficulty Level:

The surface tension of a liquid at its boiling point

(a) Becomes zero

(b) Becomes infinity

(c) is equal to the value at room temperature

(d) is half to the value at the room temperature

Concept Questions :-

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

Difficulty Level:

The surface tension of liquid is 0.5 N/m. If a film is held on a ring of area 0.02 ${\mathrm{m}}^{2}$, its surface energy is

(a)                          (b)

(c)                          (d)

Concept Questions :-

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

Difficulty Level:

What is ratio of surface energy of 1 small drop and 1 large drop, if 1000 small drops combined to form 1 large drop ?

(a) 100 : 1                           (b) 1000 : 1
(c) 10 : 1                             (d) 1 : 100

Concept Questions :-

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

Difficulty Level:

The amount of work done in forming a soap film of size is 10 cm X 10 cm(Surface tension )

(a)                  (b)

(c)                   (d)

Concept Questions :-

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

Difficulty Level:

A liquid drop of diameter D breaks upto into 27 small drops of equal size. If the surface tension of the liquid is $\mathrm{\sigma }$, then change in surface energy is

(a) ${\mathrm{\pi D}}^{2}\mathrm{\sigma }$                          (b) $2{\mathrm{\pi D}}^{2}\mathrm{\sigma }$

(c) $3{\mathrm{\pi D}}^{2}\mathrm{\sigma }$                         (d) $4{\mathrm{\pi D}}^{2}\mathrm{\sigma }$

Concept Questions :-

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

Difficulty Level:

One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy is

(a) 1000 : 1               (b) 1 : 1000
(c) 10 : 1                   (d) 1 : 10

Concept Questions :-

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

Difficulty Level:

If $\sigma$ be the surface tension, the work done in breaking a big drop of radius R in n drops of equal radius is

(a) ${\mathrm{Rn}}^{2/3}\mathrm{\sigma }$                          (b) $\left({\mathrm{n}}^{2/3}-1\right)\mathrm{R\sigma }$

(c) $\left({\mathrm{n}}^{1/3}-1\right)\mathrm{R\sigma }$                    (d) $4{\mathrm{\pi R}}^{2}\left({\mathrm{n}}^{1/3}-1\right)\mathrm{\sigma }$

Concept Questions :-

Surface tension
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Difficulty Level:

A big drop of radius R is formed by 1000 small droplets of water, then the radius of small drop is

(a) R/2                                     (b) R/5
(c) R/6                                     (d) R/10

Concept Questions :-

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

Difficulty Level:

8000 identical water drops are combined to form a big drop. Then the ratio of the final surface energy to the initial surface energy of all the drops together is
(a) 1 : 10                     (b) 1 : 15
(c) 1 : 20                      (d) 1 : 25

Concept Questions :-

Surface tension