Which of the following sublimes without heating even at the room temperature?

Camphor

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Ammonium chloride

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Dry Ice

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None of the above

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Solution

The correct option is A Dry Ice
Solid (Impure) $h e a t - - \to$ vapour $c o o l - - \to$ solid sublimate (pure)
Dry Ice (solid carbon dioxide) sublimes at room temps whereas ammonium chloride and camphor sublimes on heating.

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