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प्रश्न
Why does the bleeding stop by rubbing moist alum?
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उत्तर
Blood is a colloidal sol. When we nib the injured part with moist alum then coagulation of blood takes place. Hence main reason is coagulation, which stops the bleeding. Therefore bleeding stop by rubbing moist alum.
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संबंधित प्रश्न
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(I) (NaCl) = 52
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