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Question

Name the process associated with the following:
A drop of ink placed on the surface of water contained in a glass spreads throughout the water.

A
Diffusion.
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B
Sublimation.
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C
Absorption.
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D
Adsorption.
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Solution

The correct option is A Diffusion.
Ink diffuses in water because of random motion of water and ink molecules. Ink moves from areas of higher concentration to those of lower concentration and the rate of this movement is proportional to the diffusion coefficient of the ink in water.

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