Which of the following phenomena does not involve surface tension?

Mercury drops acquire spherical shape

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Liquids tend to rise in the capillary

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A liquid flows over a fixed surface

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Moist soil grains are pulled togther

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Solution

The correct option is A A liquid flows over a fixed surface
Examples of phenomena involves surface tension are :
$1.$ Spherical shape acquired by mercury droplets.
$2.$ Liquid tending to rise in capillary tube.
$3.$ Moist soil grains are pulled together.
The phenomena involved in a liquid flowing over a fixed surface is viscocity of fluids.

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Similar questions

Q. Assertion :Small liquid drops assume a spherical shape. Reason: Due to surface tension liquid drops tend to have minimum surface area.

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Explain why

(a) The angle of contact of mercury with glass is obtuse, while that of water with glass is acute.

(b) Water on a clean glass surface tends to spread out while mercury on the same surface tends to form drops. (Put differently, water wets glass while mercury does not.)

(d) Water with detergent dissolved in it should have small angles of contact.

(e) A drop of liquid under no external forces is always spherical in shape

Q. Assertion (A): Liquids tend to have maximum number of molecules at their surface. Reason (R): Small liquid drops have spherical shape.

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