Learn

Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyData or graph

JEE Main 8 April 2023, Shift 1, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

The vapour pressure vs. temperature curve for a solution solvent system is shown below. [graph] The boiling point of the solvent is ______∘C^\circ\mathrm{C}.

The figure, in words

Graph of vapour pressure (y) vs temperature in degC (x) with a dashed horizontal line at 1 atm. Two rising curves: the upper-left curve starts at 80 and crosses 1 atm at 82; the lower-right curve starts at 81 and crosses 1 atm at 83. Dashed verticals mark 80, 81, 82, 83 on the temperature axis.

Official answer

82

NTA final key.

Chapter
Solutions
Topic
Colligative Properties
Idea tested
Phase Diagram Interpretation: Boiling Point

Same topic in other shifts

All Colligative Properties questions
  1. 2 Apr 2026, Shift 1 · Q5519.519.5 g of fluoro acetic acid (molar mass =78 g mol−1=78\ \mathrm{g\ mol^{-1}}) is dissolved in 500500 g of water at 298298 K. The depression in the…MediumSingle correct
  2. 2 Apr 2026, Shift 2 · Q55Solution A is prepared by dissolving 1 g of a protein (molar mass = 50000 g mol−1^{-1}) in 0.5 L of water at 300 K. Its osmotic pressure…EasySingle correct
  3. 4 Apr 2026, Shift 1 · Q75A non-volatile, non-electrolyte solid solute when dissolved in 4040 g of a solvent, the vapour pressure of the solvent decreased from…MediumNumerical value
  4. 4 Apr 2026, Shift 2 · Q54At 27 ∘^\circC, 0.1 M, 1 L K4[Fe(CN)6]\mathrm{K_4[Fe(CN)_6]} aqueous solution and 0.1 M, 1 L FeCl3\mathrm{FeCl_3} aqueous solution are placed in a…MediumSingle correctHas a figure
  5. 5 Apr 2026, Shift 2 · Q7320 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height…MediumNumerical value
  6. 6 Apr 2026, Shift 1 · Q56When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was xx % of…EasySingle 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.