JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 10 April 2023, Shift 1, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0.3, then the observed freezing point will be __________% higher than the expected/theoretical freezing point. (Nearest integer)

Official answer

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Degree of Dissociation from Van't Hoff Factor

Same idea in other shifts

Asked 6× in all

7 Apr 2025, Shift 1 · Q72The percentage dissociation of a salt ( $\mathrm{MX_3}$ ) solution at given temperature (van't Hoff factor $i = 2$ ) is ___________ %(Nearest…EasyNumerical value
8 Apr 2024, Shift 1 · Q84A solution containing 10 g of an electrolyte $\mathrm{AB_2}$ in 100 g of water boils at $100.52^\circ$ C. The degree of ionization of the…MediumNumerical value
26 Jun 2022, Shift 1 · Q82A 0.5 percent solution of potassium chloride was found to freeze at $-0.24$ °C. The percentage dissociation of potassium chloride is…MediumNumerical value
25 Feb 2021, Shift 2 · Q55If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the…MediumNumerical value
17 Mar 2021, Shift 2 · Q54A 1 molal $\mathrm{K_4Fe(CN)_6}$ solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution…MediumNumerical value

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.