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A sheet can be made water proof by coati...

A sheet can be made water proof by coating it with a substance that changes the angles of contact

A

to `pi/2`

B

to zero

C

from acute to obtuse

D

from obtuse to acute

Text Solution

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The correct Answer is:
C
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MARVEL PUBLICATION-SURFACE TENSION -MULTIPLE CHOICE QUESTIONS . (STANDARD LEVEL)
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  8. At critical temperature, the surface tension of a liquid

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  10. When a soap bubble is charged :-

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  11. If the radius of a soap bubble is four times that of another, then the...

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  12. The surface tension of pure water is measured at different temperature...

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  13. When one end of a capillary tube is dipped vertically in water, the pr...

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  14. A long cylinderical glass vessel has a small hole of radius r at its b...

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  15. What is the energy required to blow a soap bubble of radius 5 cm ? [ S...

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  16. The surface tension of soap solution is 0.030 N/m . What is the energy...

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  17. Work done in increasing the size of a soap bubble from a radius of 3cm...

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  18. When NaCl is added to water, the surface tension of watr will

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