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Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueEasyData or graph

JEE Main 3 August 2021, Shift 1, Chemistry Q53

Question 53 of 90 in this shift, Chemistry question 23 of 30, Section B.

An ideal monoatomic gas traverses the cycle ABCD as shown below in the figure. The work done during the cycle is xxPV. The value of xx is ________. (Nearest integer)

The figure, in words

P-V diagram, P on vertical axis (arrow pointing up) and V on horizontal axis (arrow to the right); a rectangle ABCD with A at lower left labelled 'P,V', B at lower right labelled 'P,2V', C at upper right labelled '2V,2P', D at upper left labelled '2P,V'.

Official answer

1

NTA final key.

Chapter
Thermodynamics (Chemistry)
Topic
Thermodynamic Processes
Idea tested
Cyclic Process Work

Same idea in other shifts

Asked 7× in all
  1. 3 Apr 2025, Shift 2 · Q33An ideal gas exists in a state with pressure P0\mathrm{P_0}, volume V0\mathrm{V_0}. It is isothermally expanded to 4 times of its initial…MediumSingle correct
  2. 7 Apr 2025, Shift 1 · Q48An ideal gas has undergone through the cyclic process as shown in the figure. Work done by the gas in the entire cycle is _______…MediumNumerical valueHas a figure
  3. 9 Apr 2024, Shift 2 · Q36A real gas within a closed chamber at 27∘C27^\circ C undergoes the cyclic process as shown in figure. The gas obeys PV3=RTPV^3=RT equation for…HardSingle correctHas a figure
  4. 15 Apr 2023, Shift 1 · Q33A thermodynamic system is taken through cyclic process. The total work done in the process is :EasyDiagram basedHas a figure
  5. 24 Feb 2021, Shift 1 · Q9n mole of a perfect gas undergoes a cyclic process ABCA (see figure) consisting of the following processes. A → B : Isothermal expansion…MediumDiagram basedHas a figure
  6. 24 Feb 2021, Shift 2 · Q5If one mole of an ideal gas at (P1,V1)(P_1, V_1) is allowed to expand reversibly and isothermally (A to B) its pressure is reduced to one-half…HardDiagram basedHas a figure

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.