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Why do raisins (dried grapes) swell when kept soaked in water? -

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Question

Why do raisins (dried grapes) swell when kept soaked in water?

Short Note

Solution

The raisins contain a concentrated sap and therefore water molecules from the outside move in through the partially permeable membrane of the raisins by osmosis and raisins swell.

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Means of Transport in Plants - Concept of Osmosis
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