Question

To stop bleeding from an injury ferric chloride can be applied
Which comment about the statement is justified?

• A. It is not true, ferric chloride is a poison
• B. It is true, ${Fe}^{3+}$ ions coagulate blood which is negatively charged sol
• C. It is not true, ${Cl}^{-}$ ions from positively charged sol, profuse bleeding takes place
• D. It is true, coagulation takes place because of formation of negatively charged sol with ${Cl}^{-}$ ions.
• E. It is not true, ferric chloride is ionic and gets into blood stream

Answer 1

The correct option is B It is true, ${Fe}^{3+}$ ions coagulate blood which is negatively charged sol

To stop bleeding from an injury, Ferric chloride can be applied because of the following reason:

(A) $F{e}^{3+}$ ions coagulate blood which is a negatively charged solution
(B) $C{l}^{-}$ ions coagulate blood which is a positively charged solution

Blood being a colloidal solution, its coagulation by Hardy-Shuze's law states " Higher the charge on cation higher will be its efficiency to coagulate the colloidal solution" . Thus Option B is correct.