Question

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

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

Answer 1

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 $FeC{l}_3$ solution. The addition of $A{l}^{3+}$ or $F{e}^{3+}$ causes coagulation of blood, so bleeding stops.