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प्रश्न
Why does bleeding stop by rubbing moist alum?
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उत्तर
Blood is a colloidal solution when we rub moist alum on that part it causes coagulation which stops bleeding.
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संबंधित प्रश्न
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Gel
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(i) \[\ce{KCl}\]
(ii) glucose
(iii) urea
(iv) \[\ce{NaCl}\]
Colloids can
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