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Question

Bleeding is stopped by the application of ferric chloride. This is because:

A
The blood starts flowing in opposite direction
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B
The blood reacts and forms a solid, which seals the blood vessel
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C
The blood is coagulated and thus, the blood vessel is sealed
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D
The ferric chloride seals the blood vessel
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Solution

The correct option is C The blood is coagulated and thus, the blood vessel is sealed
Blood is a colloidal solution containing a - ve charge colloidal particle (Albuminoid), bleeding can be stopped by use of alum or FeCl3 solution. The addition of Al3+ or Fe3+ causes coagulation of blood, so bleeding stops.

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