A) co-agulation of negatively charged blood particles by\[F{{e}^{3+}}\]ions
B) co-agulation of positively charged blood particles by\[C{{l}^{-}}\]ions
C) reaction taking place between ferric ions and the haemoglobin forming a complex
D) common element, iron, in both\[FeC{{l}_{3}}\]and haemoglobin.
Correct Answer: A
Solution :
Bleeding due to cut can be stopped by applying \[FeC{{l}_{3}}\]or alum solution. This is due to co-agulation of negatively charged colloidal blood particles (albuminoid substance) by positively charged\[F{{e}^{3+}}\]ions. These substances are used as styptic (which check the flow of blood).
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