JEE Main 2023 — Surface Chemistry Question with Solution
From: JEE Main 2023 (Online) 10th April Evening Shift
Question
Ferric chloride is applied to stop bleeding because -
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
The correct answer is Option D: Fe3+ ions coagulate blood which is a negatively charged sol.
Blood is a colloidal solution, which means that it is made up of small particles suspended in a liquid. The particles in blood are negatively charged, and the negative charge prevents the particles from clumping together. When ferric chloride is applied to a bleeding wound, the Fe3+ ions in the ferric chloride react with the negatively charged particles in the blood. This reaction causes the particles to clump together, forming a clot that stops the bleeding.
The other options are incorrect:
- Option A is incorrect. Blood is not a positively charged sol.
- Option B is incorrect. Blood does not absorb ferric chloride.
- Option C is incorrect. Cl- ions do not cause coagulation of blood.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Surface Chemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2023, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.