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A crystal of potassium permanganate was placed at the bottom of a beaker of water. The beaker was left undisturbed for 20 minutes. Which figure correctly shows the appearance of the beaker of water after 30 minutes?

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answer is C.

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Detailed Solution

When a crystal of ${KMnO}_{4}$ is placed at bottom of water, it will undergo diffusion in water. After 30 minutes, the solution in a beaker appears as pink in color. Therefore, the correct answer is “option C”.

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