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

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
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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
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If work done in increasing the size of a soap film from  to  is  then the surface tension is

(a)               (b)

(c)               (d)

Concept Questions :-

Surface tension
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Difficulty Level:

A mercury drop of radius 1cm is sprayed into ${10}^{6}$ drops of equal size. The energy expended in joules is (surface tension of Mercury is )

(a) 0.057                      (b) 5.7

(c) $5.7×{10}^{-4}$                (d) $5.7×{10}^{-6}$

Concept Questions :-

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

Difficulty Level:

When two small bubbles join to form a bigger one, energy is

(a) Released                           (b) Absorbed
(c) Both (a) and (b)                (d) None of these

Concept Questions :-

Surface tension

Difficulty Level:

A film of water is formed between two straight parallel wires of length 10cm each separated by 0.5 cm. If their separation is increased by 1 mm while still maintaining their parallelism, how much work will have to be done (Surface tension of water =)

(a)                          (b)

(c)                           (d)

Concept Questions :-

Surface tension
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Difficulty Level:

A drop of mercury of radius 2 mm is split into 8 identical droplets. Find the increase in surface energy. (Surface tension of mercury is
(a)                              (b)
(c)                               (d)

Concept Questions :-

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

Difficulty Level:

Two small drops of mercury, each of radius r, coalesce to form a single large drop. The ratio of the total surface energies before and after the change is

1. $1:{2}^{1/3}$                          2.

3. 2:1                              4. 1:2

Concept Questions :-

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

Difficulty Level:

The work done in blowing a soap bubble of radius 0.2 m is (the surface tension of soap solution being 0.06 N/m)

(a)                  (b)

(c)                  (d) None of these

Concept Questions :-

Surface tension