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Saturday, 31 October

JEE Main 2020 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 8 January 2020, Shift 1, Chemistry Q47

Question 47 of 75 in this shift, Chemistry question 22 of 25, Section B.

The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is ______.

The figure, in words

Pressure (Pa) vs Volume (m^3) graph. P ticks 4, 6, 8, 10; V ticks 4, 6, 8, 10, 12; axis crossing labelled (2, 2). A is at P = 8 on the P side; AB is horizontal at P = 8 up to V = 8 (B); BC is a straight line sloping down from B to C on the V axis at V = 12.

Official answer

48.00 to 48.00

NTA final key (Jan 2020). Any value in the range scored.

Chapter
Thermodynamics (Chemistry)
Topic
First Law of Thermodynamics
Idea tested
Work Done from P-V Graph Area

Same idea in other shifts

Asked 2× in all
  1. 29 Jul 2022, Shift 2 · Q47A thermodynamic system is taken from an original state D to an intermediate state E by the linear process shown in the figure. Its volume…EasyDiagram 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.