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JIPMER 2018
Exam
JIPMER
Year
2018
Subject
Chemistry
Chapter
Surface Chemistry

JIPMER 2018 · Chemistry · Surface Chemistry

Bleeding due to a cut can be stopped by applying ferric chloride...

Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

Options

  1. Acoagulation of negatively charged blood particles by Fe 3+{ }^{3+} ions.
  2. Bcoagulation of positively charged blood particles by Cl−\mathrm{Cl}^{-}ions.
  3. Creaction taking place between ferric ions and the haemoglobin forming a complex.
  4. Dcommon element, iron, in both FeCl3\mathrm{FeCl}_3 and haemoglobin.

Correct answer

A. coagulation of negatively charged blood particles by Fe 3+{ }^{3+} ions.

Step-by-step solution

Bleeding due to a cut can be stopped by applying FeCl3\mathrm{FeCl}_3 or alum solution. This is due to coagulation of negatively charged colloidal blood particles (albuminoid substance) by positively charged Fe3+\mathrm{Fe}^{3+} ions. These substances are used as styptic (which check the flow of blood).
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