JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 25 February 2021, Shift 1, Physics Q29

Question 29 of 90 in this shift, Physics question 29 of 30, Section B.

In a certain thermodynamical process, the pressure of a gas depends on its volume as

kV^{3}

. The work done when the temperature changes from

100^{\circ}

C to

300^{\circ}

C will be __________ nR, where n denotes number of moles of a gas.

Official answer

NTA final key.

Chapter: Thermodynamics
Topic: Thermodynamic Processes
Idea tested: Polytropic Process Analysis

Same idea in other shifts

Asked 5× in all

1 Feb 2024, Shift 1 · Q38The pressure and volume of an ideal gas are related as $PV^{\frac{3}{2}} = K$ (Constant). The work done when the gas is taken from state A…MediumSingle correct
30 Jan 2024, Shift 1 · Q38Two thermodynamical processes are shown in the figure. The molar heat capacity for process A and B are $C_A$ and $C_B$ . The molar heat…HardDiagram basedHas a figure
25 Feb 2021, Shift 2 · Q5Thermodynamic process is shown below on a P-V diagram for one mole of an ideal gas. If $V_2 = 2V_1$ then the ratio of temperature…EasyDiagram basedHas a figure
26 Feb 2021, Shift 2 · Q23The volume V of a given mass of monoatomic gas changes with temperature T according to the relation V = K $T^{\frac{2}{3}}$ . The workdone…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.