JIPMER2018ChemistrySurface Chemistry
Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to
Options
- Acoagulation of negatively charged blood particles by Fe ³⁺ ions.
- Bcoagulation of positively charged blood particles by Cl ⁻ ions.
- Creaction taking place between ferric ions and the haemoglobin forming a complex.
- Dcommon element, iron, in both FeCl ₃ and haemoglobin.
Correct answer
A. coagulation of negatively charged blood particles by Fe ³⁺ ions.
Step-by-step solution
Bleeding due to a cut can be stopped by applying FeCl ₃ or alum solution. This is due to coagulation of negatively charged colloidal blood particles (albuminoid substance) by positively charged Fe ³⁺ ions. These substances are used as styptic (which check the flow of blood).