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Why does bleeding stop by rubbing moist alum? - Chemistry

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Question

Why does bleeding stop by rubbing moist alum?

Short Note

Solution

Blood is a colloidal solution when we rub moist alum on that part it causes coagulation which stops bleeding.

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Chapter 5: Surface Chemistry - Exercises [Page 70]

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NCERT Exemplar Chemistry [English] Class 12
Chapter 5 Surface Chemistry
Exercises | Q III. 55. | Page 70

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