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The surface tension of soap solution is ...

The surface tension of soap solution is 0.035 N/m . The energy needed to increase the radius of the bubble from 4 cm to 6 cm is

A

`1.5 xx 10^(-3)` J

B

`1.5xx10^(-2)`J

C

`3xx10^(-2)`J

D

`1.5xx10^(-4)`J

Text Solution

Verified by Experts

The correct Answer is:
A
` dE = 8 pi T (R_(2)^(2) - R_(1)^(2))`
`= 8 xx 22/7 xx 35 xx10^(-3) (36-16)xx10^(-4)`
` = 1.5 xx 10^(-3)` J
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NIKITA PUBLICATION-SURFACE TENSION-Multiple Choice Questions (Question Given in MHT-CET )
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  2. The surface of water in contact with glass wall is

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  3. Work done in forming a liquid drop of radius R is W(1) and that of rad...

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  4. For liquid to rise in a capillary tube , the angle of contact should b...

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  5. Out of the following , which is not an example of capillary action

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  6. If a liquid does not wet glass, its angle of contact is

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  7. The surface tension of soap solution is 0.035 N/m . The energy needed...

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  8. A square frame of length L is immersed in soap solution and taken ou...

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  9. The potential energy of molecule on the surface of a liquid as compare...

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  10. If NaCl is dissolved into water , then its surface tension

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  11. Absorption of water by filter paper is due to

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  12. S.I. Unit of surface tension is:

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  13. A spherical liquid drop of radius R is divided into eight equal drople...

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  14. The potential energy of molecule on the surface of a liquid as compare...

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  15. n' droplets of equal of radius r coalesce to form a bigger drop of rad...

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

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  17. In which of the following substances , surface tension increases with ...

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  18. The angle of contact for pure water and clean glass surface is

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  19. A liquid rises to a height of 1.8 cm in a glass capillary A another g...

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  20. A large number of liquid drops each of radius 'a' coalesce to form a s...

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