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Substances, Objects and Energy — EVS STD 5 — Question

Maharashtra BoardEnglish MediumSTD 5EVSSubstances, Objects and Energy1 Mark
Question
Why do naphthalene balls grow smaller in size and gradually disappear?
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Answer

Naphthalene when left open continuously gets converted into small gaseous particles, so, as these particles leave the naphthalene balls, they grow smaller is size and slowly disappear.

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