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प्रश्न
Why does a lump of cotton wool shrink in water?
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उत्तर
A lump of cotton wool shrinks when immersed in water. This is because air present in the cotton wool escapes. Thus, the volume of the cotton wool decreases.
संबंधित प्रश्न
What happens when Carbon burns in oxygen ? Also give the balanced chemical equation for the reaction.
Fill in the blanks
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