Swelling of gum in water is due to

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(A) Imbibition is a special type of diffusion when water is absorbed by solids—colloids—causing them to enormously increase in volume.When dry gum or

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Imbibition

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(A) Imbibition is a special type of diffusion when water is absorbed by solids—colloids—causing them to enormously increase in volume.When dry gum or pieces of agar-agar are placed in water,they absorb water through the process of imbibition,which leads to their swelling and an increase in their volume.Therefore,the correct answer is $A$.

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