Question

Ferric chloride is used to stop bleeding in cuts because

• A. $F{e}^{3+}$ coagulates blood which is positively charged sol
• B. $F{e}^{3+}$ coagulates blood which is negatively charged sol
• C. $C{l}^{-}$ coagulates blood which is positively charged sol
• D. $C{l}^{-}$ coagulates blood which is negatively charged sol

Answer 1

Answer: (B)

Ferric chloride is used to stop bleeding in cuts because $F{e}^{3+}$ coagulates blood which is negatively charged sol. As we know blood is a colloidal sol. On rubbing the injured part with $F{e}^{3+}$ then coagulation of blood takes place. Hence, main reason is coagulation, which stops bleeding.