How does a drop of red ink get evenly distributed in water ?

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Solution

A drop of red ink gets evenly distributed in the water because of diffusion. Ink particles diffuse into the particles of water.
Diffusion is the process in which particles move from a region of higher concentration to a region of lower concentration.
Here due to the random motion of ink particles and water, ink particles get diffused into the water particles.
Ink particles will show diffusion and would move from a region of high concentrations to low concentrations.
Hence, a drop of red ink gets evenly distributed in the water.

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