JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 10 April 2023, Shift 2, Chemistry Q63

Question 63 of 90 in this shift, Chemistry question 3 of 30, Section A.

Ferric chloride is applied to stop bleeding because -

(1) $\mathrm{FeCl_3}$ reacts with the constituents of blood which is a positively charged sol.
(2) $\mathrm{Cl^-}$ ions cause coagulation of blood.
(3) $\mathrm{Fe^{3+}}$ ions coagulate blood which is a negatively charged sol.Official answer
(4)Blood absorbs $\mathrm{FeCl_3}$ and forms a complex.

Official answer

Option 3

NTA final key.

Chapter: Surface Chemistry
Topic: Colloids
Idea tested: Hardy-Schulze Rule

Same idea in other shifts

Asked 5× in all

15 Apr 2023, Shift 1 · Q8620 mL of 0.5 M NaCl is required to coagulate 200 mL of $\mathrm{As_2S_3}$ solution in 2 hours. The coagulating value of NaCl is __________.EasyNumerical value
24 Feb 2021, Shift 2 · Q33Most suitable salt which can be used for efficient clotting of blood will be :EasySingle correct
17 Mar 2021, Shift 2 · Q33For the coagulation of a negative sol, the species below, that has the highest flocculating power is :EasySingle correct
8 Jan 2020, Shift 1 · Q28As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.