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Air Around Us — Science STD 6 — Question

Gujarat BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
Question
Why does a lump of cotton wool shrink in water?
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Answer

Small pores are present between the fibres of cotton wool. Sufficient volume of air is present in these pores. When a lump of cotton wool is dipped in water, this air is replaced by less volume of water, so the cotton wool shrinks.

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