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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceDiagram basedMediumData or graph

JEE Main 2 September 2020, Shift 1, Chemistry Q31

Question 31 of 75 in this shift, Chemistry question 6 of 25.

Which one of the following graphs is not correct for ideal gas ? dd = Density, PP = Pressure, TT = Temperature

The figure, in words

Four small graphs of density d: I - d vs T, decreasing curve (hyperbola-like); II - d vs T, straight line rising; III - d vs 1/T, straight line rising; IV - d vs P, straight line rising.
  1. (1)I
  2. (2)IIOfficial answer
  3. (3)III
  4. (4)IV

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
States of Matter
Topic
Ideal Gas Laws
Idea tested
Graphical Analysis of Gas Laws

Same topic in other shifts

All Ideal Gas Laws questions
  1. 4 Apr 2026, Shift 1 · Q35One gas of n1n_1 mole of molecules at temperature T1T_1, volume V1V_1, and pressure P1P_1, and another gas of n2n_2 mole of molecules at…MediumSingle correct
  2. 6 Apr 2026, Shift 1 · Q35Two closed vessels of same volume are joined through a narrow tube and both vessels are filled with air of pressure 90 kPa and temperature…MediumSingle correct
  3. 3 Apr 2025, Shift 2 · Q34Pressure of an ideal gas, contained in a closed vessel, is increased by 0.4% when heated by 1∘1^\circC. Its initial temperature must be:MediumSingle correct
  4. 4 Apr 2025, Shift 2 · Q45There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel contains the gas at 8…MediumSingle correct
  5. 7 Apr 2025, Shift 1 · Q51At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0 and argon gas: 3.0. If total…MediumSingle correct
  6. 25 Jul 2022, Shift 1 · Q83The pressure of a moist gas at 27∘27^\circC is 44 atm. The volume of the container is doubled at the same temperature. The new pressure of…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 42 of the 174 JEE Main shifts held from 2017 to 2026.