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Important Questions on Surface Tension

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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 73
The excess pressure inside an air bubble of radius r just below (inside) the surface of the water is ​P1. The pressure inside a drop of the same size (radius) which is just outside the water surface is P2. If T is the surface tension then
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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 74
If a water drop is kept between two glass plates, then its shape is
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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 75

The angle of contact for a liquid which wets the surface of a solid is

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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 76

The value of contact angle for kerosene with solid surface is

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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 77

When a droplet of water is poured on a-plane surface of a wax, then it will

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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 78
A spherical drop of water has radius 1 mm If the surface tension of water is 70×10−3 N m-1. Difference of pressures between inside and outside of the spherical drop is
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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 79
Consider a liquid contained in a vessel. The liquid solid adhesive force is very weak as compared to the cohesive force in the liquid. The shape of the liquid surface near the solid shall be
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Physics Crash Course MHT-CET>Chapter 6 - Surface Tension>Exercise 1>Q 80

If a liquid does not rise or fall in a capillary tube, then its angle of contact is