Which method is employed in the separation of potassium nitrate and common salt?

Gravitation

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Sublimation

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Solvent extraction

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Fractional crystallization

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Solution

The correct option is D
Fractional crystallization

Mixture of substances can be separated based on the difference in various physical properties such as boiling point, melting point density etc. Potassium nitrate and common salt are solids. Fractional crystallization method is used to separate this mixture due to the difference in their solubilities in particular (different solvents).

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