JEE Main Chemistry question

Not in JEE Main or NEET syllabus

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

(A)Coagulation of negatively charged blood particles by ionsCorrect
(B)Coagulation of positively charged blood particles by ions
(C)Reaction taking place between ferric ions and the haemoglobin forming a complex
(D)Common element, iron, in both and haemoglobin

Answer: (A)

Solution

Blood is a negatively charged colloidal (albuminoid) system, and the highly charged cation from is a very effective coagulant for such negative sols, causing

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Question ID VK-144753