If moth balls are kept at room temperature, then they undergo:

Boiling

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Melting

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Sublimation

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Condensation

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Solution

The correct option is C Sublimation
Sublimation is the direct conversion of the solid state to the gaseous state of matter, without passing through the intermediate liquid state.

Moth balls, when kept in open, change their state directly from solid to gas, without changing into liquid. Hence, moth balls undergo sublimation.

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