Which of the following mixtures cannot be separated by sublimation?

Salt and ammonium chloride

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Salt and naphthalene

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Salt and camphor

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Camphor and naphthalene

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Solution

The correct option is D Camphor and naphthalene
Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Ammonium chloride, camphor, anthracene, napthalene can sublime but common salt cannot sublime. Hence, option D is correct.

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