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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceMatch the listEasyConceptual

JEE Main 4 September 2020, Shift 2, Physics Q9

Question 9 of 75 in this shift, Physics question 9 of 25.

Match the thermodynamic processes taking place in a system with the correct conditions. In the table : ΔQ\Delta Q is the heat supplied, ΔW\Delta W is the work done and ΔU\Delta U is change in internal energy of the system. Process Condition (I) Adiabatic (A) ΔW=0\Delta W = 0 (II) Isothermal (B) ΔQ=0\Delta Q = 0 (III) Isochoric (C) ΔU≠0, ΔW≠0, ΔQ≠0\Delta U \neq 0,\ \Delta W \neq 0,\ \Delta Q \neq 0 (IV) Isobaric (D) ΔU=0\Delta U = 0
  1. (1)(I) - (B), (II) - (A), (III) - (D), (IV) - (C)
  2. (2)(I) - (B), (II) - (D), (III) - (A), (IV) - (C)Official answer
  3. (3)(I) - (A), (II) - (A), (III) - (B), (IV) - (C)
  4. (4)(I) - (A), (II) - (B), (III) - (D), (IV) - (D)

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Thermodynamics
Topic
Thermodynamic Processes
Idea tested
Adiabatic Process Analysis

Same idea in other shifts

Asked 16× in all
  1. 6 Apr 2026, Shift 2 · Q30A cylinder with adiabatic walls is closed at both ends and is divided into two compartments by a frictionless adiabatic piston. Ideal gas…HardSingle correct
  2. 2 Apr 2025, Shift 1 · Q31In an adiabatic process, which of the following statements is true ?EasySingle correct
  3. 2 Apr 2025, Shift 2 · Q32Identify the characteristics of an adiabatic process in a monoatomic gas. (A) Internal energy is constant. (B) Work done in the process is…MediumOther
  4. 8 Apr 2025, Shift 2 · Q33A monoatomic gas having γ=53\gamma = \frac{5}{3} is stored in a thermally insulated container and the gas is suddenly compressed to…EasySingle correct
  5. 4 Apr 2024, Shift 2 · Q39A sample of gas at temperature TT is adiabatically expanded to double its volume. Adiabatic constant for the gas is γ=3/2\gamma = 3/2. The…MediumSingle correct
  6. 9 Apr 2024, Shift 1 · Q38A sample of 11 mole gas at temperature T is adiabatically expanded to double its volume. If adiabatic constant for the gas is…MediumSingle correct
  7. 9 Apr 2024, Shift 1 · Q39The volume of an ideal gas (γ=1.5\gamma=1.5) is changed adiabatically from 55 litres to 44 litres. The ratio of initial pressure to final…EasySingle correct
  8. 10 Apr 2023, Shift 1 · Q33Consider two containers A and B containing monoatomic gases at the same Pressure (P), Volume (V) and Temperature (T). The gas in A is…MediumSingle correct

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.