Which phenomenon occurs during the following change?
Size of naphtalene balls decreases.

condensation

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sublimation

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evaporation

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melting

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Solution

The correct option is B sublimation
Sublimation is the phase transition of a substance directly from solid to the gas phase without passing through the intermediate liquid phase.
Naphthalene balls are kept with clothes and documents to protect them from insects. Since naphthalene balls go under sublimation, hence it changes into vapour without changing into liquid and its vapour protects our clothes and documents.

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