Jump to a section

Physics - Thermodynamics

Practise 27 KVPY previous year questions on Thermodynamics, compiled from papers spanning 2010 to 2020. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KVPY tests.

  1. 1An engine runs between a reservoir at temperature 200 K and a hot body which is initially at temperature of 600 K . If the hot body cools do2020 (SB/SX)
  2. 2The efficiency of the cycle shown below in the figure (consisting of one isobar, one adiabat and one isotherm) is 50 % . The ratio, x , betw2020 (SB/SX)
  3. 3Which one of the following schematic graphs best represents the variation of p V (in Joules) versus (in Kelvin) of one mole of an ideal gas?2019 (SA)
  4. 4A hot air balloon with a payload rises in the air. Assume that the balloon is spherical in shape with diameter of 11 . 7 m and the mass of t2019 (SA)
  5. 50 . 02 moles of an ideal diatomic gas with initial temperature 20 C is compressed from 1500 cm 3 to 500 cm 3 . The thermodynamic process is 2019 (SB/SX)
  6. 6Two containers C 1 and C 2 of volumes V and 4 V respectively, hold the same ideal gas and are connected by a thin horizontal tube of negligi2019 (SB/SX)
  7. 7A thermally insulated rigid container of 1 L volume contains a diatomic ideal gas at room temperature. A small paddle installed inside the c2018 (SB/SX)
  8. 8For an ideal gas, the internal energy is given by U = 5 p V / 2 + C , where C is a constant. The equation of the adiabats in the p V -plane 2018 (SB/SX)
  9. 9An ideal gas is made to undergo the cyclic process shown in the figure below. Let Δ W depict the work done, Δ U be the change in internal en2018 (SB/SX)
  10. 10One mole of a monoatomic gas and one mole of a diatomic gas are initially in the same state. Both gases are expanded isothermally and then a2018 (SB/SX)
  11. 11Graphs below show the entropy versus energy U of two systems 1 and 2 at constant volume. The initial energies of the systems are indicated b2018 (SB/SX)
  12. 12One mole of an ideal monatomic gas undergoes the following four reversible processes: Step it is first compressed adiabatically from volume 19 Nov, 2017 (SB/SX)
  13. 13A thin piece of thermal conductor of constant thermal conductivity insulated on the lateral sides connects two reservoirs which are maintain05 Nov, 2017 (SB/SX)
  14. 14One mole of an ideal monatomic gas undergoes the following four reversible processes : Step1 : It is first compressed adiabatically from vol05 Nov, 2017 (SB/SX)
  15. 15A gas obeying the equation of state undergoes a hypothetical reversible process described by the equation, where and are dimensioned constan05 Nov, 2017 (SB/SX)
  16. 16The heat capacity of one mole an ideal is found to be where a is a constant. The equation obeyed by this gas during a reversible adiabatic e2016 (SB/SX)
  17. 17An ideal gas is taken reversibly around the cycle a-b-c-d-a as shown on the (temperature) - S (entrophy) diagram The most appropriate repres2016 (SB/SX)
  18. 18A gas at initial temperature T undergoes sudden expansion from volume to . Then -2016 (SB/SX)
  19. 19One mole of a monoatomic ideal gas is expanded by a process described by where is a constant. The heat capacity of the gas during the proces2014 (SB/SX)
  20. 20In the P-V diagram below the dashed curved line is an adiabat, For a process that is described by a straight line joining two points and on 2013 (SB/SX)
  21. 21The three processes in a thermodynamic cycle shown in the figure are : Process is isothermal; Process is isochoric (volume remains constant)2013 (SB/SX)
  22. 22The equation of state of moles of a non-ideal gas can be approximated by the equation where a and b are constants characteristic of the gas.2013 (SB/SX)
  23. 23The bulk modulus of a gas is defined as . For an adiabatic process the variation of is proportional to . For an idea gas, is2013 (SB/SX)
  24. 24A constant amount of an ideal gas undergoes the cyclic process ABCA in the PV diagram shown below The path is an isothermal. The work done b2011 (SB/SX)
  25. 25A container with rigid walls is covered with perfectly insulating material. The container is divided into two parts by a partition. One part2011 (SB/SX)
  26. 26An ideal gas is made to undergo a cycle depicted by the PV diagram alongside. The curved line from to is an adiabat. Then-2010 (SB/SX)
  27. 27A piece of hot copper at is plunged into a pond at . The copper cools down to , while the pond, being huge, stays at its initial temperature2010 (SB/SX)

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 27 questions compiled from KVPY papers spanning 2010 to 2020.

2.Are these questions only from KVPY, or from other exams too?

These are KVPY questions specifically for the Thermodynamics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Thermodynamics an important chapter for KVPY Physics?

Thermodynamics has appeared in 9 of the 11 years of KVPY papers covered here, with 27 questions across 11 papers - about 2 per paper it appears in.