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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedEasyData or graph

JEE Main 27 June 2022, Shift 2, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas?

The figure, in words

Four option graphs of p (atm) vs d (g cm^-3), each headed T3 > T2 > T1: A and D are falling curves, B and C are straight lines from the origin; the order of the T labels differs between options.
  1. (1)[figure: axes y (labelled p (atm)) and x (labelled d (g cm−3^{-3})), heading T3>T2>T1\mathrm{T_3 > T_2 > T_1}; three falling curves (hyperbola-like) from top left to bottom right, labelled T1\mathrm{T_1} (top), T2\mathrm{T_2}, T3\mathrm{T_3} (bottom)]
  2. (2)[figure: axes y (labelled p (atm)) and x (labelled d (g cm−3^{-3})), heading T3>T2>T1\mathrm{T_3 > T_2 > T_1}; three straight lines from the origin, labelled T3\mathrm{T_3} (steepest, top), T2\mathrm{T_2}, T1\mathrm{T_1} (lowest)]Official answer
  3. (3)[figure: axes y (labelled p (atm)) and x (labelled d (g cm−3^{-3})), heading T3>T2>T1\mathrm{T_3 > T_2 > T_1}; three straight lines from the origin, labelled T1\mathrm{T_1} (steepest, top), T2\mathrm{T_2}, T3\mathrm{T_3} (lowest)]
  4. (4)[figure: axes y (labelled p (atm)) and x (labelled d (g cm−3^{-3})), heading T3>T2>T1\mathrm{T_3 > T_2 > T_1}; three falling curves (hyperbola-like) from top left to bottom right, labelled T3\mathrm{T_3} (top), T2\mathrm{T_2}, T1\mathrm{T_1} (bottom)]

Official answer

Option 2

NTA final key.

Chapter
States of Matter
Topic
Ideal Gas Laws
Idea tested
Gas Density and Molar Mass

Same idea in other shifts

Asked 3× in all
  1. 29 Jun 2022, Shift 1 · Q81Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 gL−10.46\ \mathrm{gL^{-1}} at…MediumNumerical value
  2. 3 Aug 2021, Shift 1 · Q51Assuming H2\mathrm{H_2} is an ideal gas, consider the quantity “P.dd”, where ‘P’ is the pressure in atm and ‘dd’ is the density in g…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. 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.