JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 29 July 2022, Shift 1, Physics Q53

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

The pressure

P_1

and density

d_1

of diatomic gas

\left(\gamma = \frac{7}{5}\right)

changes suddenly to

P_2

P_1

) and

d_2

respectively during an adiabatic process. The temperature of the gas increases and becomes __________ times of its initial temperature. (given

\frac{d_2}{d_1}

= 32)

Official answer

NTA final key.

Chapter: Thermodynamics
Topic: Thermodynamic Processes
Idea tested: Adiabatic T-V and P-T Relations

Same idea in other shifts

Asked 5× in all

5 Apr 2024, Shift 2 · Q49During an adiabatic process, if the pressure of a gas is found to be proportional to the cube of its absolute temperature, then the ratio…MediumSingle correct
25 Jul 2021, Shift 1 · Q20A monoatomic ideal gas, initially at temperature $T_1$ is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to…EasySingle correct
9 Jan 2020, Shift 2 · Q21Starting at temperature 300 K, one mole of an ideal diatomic gas ( $\gamma = 1.4$ ) is first compressed adiabatically from volume $V_1$ to…MediumNumerical value
2 Sep 2020, Shift 1 · Q22An engine takes in 5 moles of air at $20^\circ$ C and 1 atm, and compresses it adiabaticaly to $1/10^{\mathrm{th}}$ of the original volume.…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.