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Physics - Thermodynamics

Practise 160 NTA Abhyas (JEE Main) questions on Thermodynamics. Each question shows a quick preview so you can jump straight to the topic you want to revise.

Thermodynamics has been asked in 0 of the 25 years of NTA Abhyas (JEE Main) papers analysed (2002–2026), with 160 questions in all. 100% of them were easy, 0% moderate and 0% tough. Most of its questions came from 2026, with 0 questions that year. In the last three years (2024–2026) it had 0 questions across 49 papers, about 0 per paper.

All of the chapter's questions come from a single topic, Uncategorized.

  1. 1A Carnot reversible engine converts 1/6 of heat input into work. When the temperature of the sink is reduced by 62 K , the efficiency of Car
  2. 2Determine the work done by an ideal gas undergoing a cyclic process from 1 → 4 → 3 → 2 → 1 . Given P 1 = 10 5 Pa , P 0 = 3 × 10 5 Pa , P 3 =
  3. 3Carbon monoxide is carried around a closed cyclic process a b c , in which b c is an isothermal process, as shown in the diagram. The gas ab
  4. 4An ideal gas undergoes the cyclic process abca as shown in the figure. The internal energy change of the gas along the path c a is − 180 J .
  5. 5The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is
  6. 6A cylindrical adiabatic container of total volume 2 V 0 is divided into two equal parts by a conducting piston which is free to move as show
  7. 72 kg of ice at - 20°C is mixed with 5 kg of water at 20°C . The water content of the final mixture is (Latent heat of ice = 80 kcal kg - 1 ,
  8. 8For an ideal gas, the specific heat capacity during an isentropic process is always
  9. 9Two identical glass bulbs are interconnected by a thin glass tube. A gas is filled in these bulbs at NTP. If one bulb is placed in ice and a
  10. 10An ideal gas γ = 1.5 undergoes a thermodynamic process in which the temperature and pressure of the gas are related as T - 1 P 2 = constant.
  11. 11N moles of an ideal diatomic gas is enclosed in a cylinder at temperature T . suppose on supplying heat to the gas, its temperature remains
  12. 12An ideal gas is compressed to half of its initial volume by means of several processes. Which of the process results in the maximum work don
  13. 13Diagram shows the variation of internal energy ( U ) with the pressure ( P ) of 2 . 0 mole gas in cyclic process abcda . The temperature of
  14. 14Three samples of the same gas A , B and C ( γ = 3 2 ) have equal volume initially. Now, the volume of each sample is doubled. For A , the pr
  15. 15A Carnot engine has efficiency 1 5 . Efficiency becomes 1 3 when the temperature of sink is decreased by 50 K . Temperature of the sink ( in
  16. 16An earthen pitcher loses 1 g of water per minute due to evaporation. If the water equivalent of pitcher is 0 . 5 kg and the pitcher contains
  17. 17Air is filled in a bottle at atmospheric pressure and it is corked at 35 ° C . If the cork can come out at a pressure 3 times the atmospheri
  18. 18A Carnot engine whose sink is at 300 K has an efficiency of 40 % . By how much should the temperature of source be increased so as to increa
  19. 19A sound wave passing through the air at NTP produces a pressure of 0 . 001 dyne cm - 2 during a compression. The corresponding change in tem
  20. 20Diagram shows the variation in the internal energy U with the volume V of 2.0 moles of an ideal gas in cyclic process abcda. The temperature
  21. 21A vessel contains two non-reactive gases neon (monatomic) and oxygen (diatomic). The ratio of their partial pressures is 3 : 2 . the ratio o
  22. 22Two ideal Carnot engines operate in cascade (all heat given up by one engine is used by the other engine to produce work) between temperatur
  23. 23One mole of an ideal gas is taken along the process in which P V x = constant. The graph shown represents the variation of molar heat capaci
  24. 24One mole of a monoatomic ideal gas undergoes the process A ⟶ B , as in the given P - V diagram. The specific heat for this process is
  25. 25An ideal gas is taken through the cycle A → B → C → A , as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J , th
  26. 26A cooking vessel on a slow burner contains 5 kg of water and an unknown mass of ice in equilibrium at 0 o C at time t = 0. The temperature o
  27. 27A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature T . Neglecting all vibrational modes we calculated the total
  28. 28A system undergoes a reversible adiabatic process. The entropy of the system
  29. 29Two identical systems, with heat capacity at a constant volume that varies as C v = b T 3 (where b is a constant) are thermally isolated. In
  30. 30Two gases occupy two containers A and B ; the gas in A , of volume 0 . 10 m 3 , exerts a pressure of 1 . 40 MPa and that in B , of volume 0
  31. 31An ideal gas expands isothermally from a volume V 1 to V 2 and then compressed to original volume V 1 adiabatically. The initial pressure is
  32. 32The root mean square rms speed of oxygen molecules (O 2 ) at a certain temperature T (on kelvin scale) is V . If the temperature is doubled
  33. 33Earth receives 1400 W m - 2 of solar power. If all the solar energy falling on a lens of area 0 . 2 m - 2 is focussed on to a block of ice o
  34. 34Two soap bubbles of radii x and y coalesce to constitute a bubble of radius z. Then z is equal to
  35. 35Two containers of equal volume contain the same gas at the pressure p 1 and p 2 and absolute temperatures T 1 and T 2 respectively. On joini
  36. 36One mole of a monatomic gas is taken from a point A to another point N along with the path ACB . The initial temperature at A is T 0 . Calcu
  37. 37A cylindrical adiabatic container of total volume 2 V 0 divided into two equal parts by a conducting piston which is free to move as shown i
  38. 38A lead bullet strikes a target with a velocity of 480 ms - 1 . After the impact, the bullet falls dead and the heat produced in the process
  39. 39An ideal gas ( γ = 1.5 ) is expanded adiabatically. How many times its initial volume should the gas be expanded to reduce the root mean squ
  40. 40For which combination of working temperatures, the efficiency of Carnot's engine is the least?
  41. 41A diatomic molecule can be modelled as two rigid balls connected with a spring such that the balls can vibrate with respect to the centre of
  42. 42Temperature and volume curves are drawn for two thermodynamic processes. For the first process, it is a straight line and for the second, it
  43. 43One mole of a perfect gas, initially at a pressure and temperature of 10 5 N m - 2 and 300 K , respectively, expands isothermally until its
  44. 44During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C P C V fo
  45. 45A metal sphere of radius r and specific heat S is rotated about an axis passing through its centre, at a speed of n rotations per second. It
  46. 46If 2 moles of diatomic gas and 1 mole of monatomic gas are mixed, then the ratio of specific heats for the mixture is
  47. 47A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energ
  48. 48Some ideal monoatomic gas A in an enclosure has a pressure P and the temperature T . Another ideal monoatomic gas B enclosed in a container
  49. 49P - V diagram of an ideal gas is shown. The gas undergoes from initial state A to final state B such that initial and final volumes are same
  50. 50A sound wave passing through the air at NTP produces a pressure of 0 . 001 dyne cm - 2 during a compression. The corresponding change in tem

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 160 NTA Abhyas (JEE Main) questions.

2.Are these questions only from NTA Abhyas (JEE Main), or from other exams too?

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

3.What is the difficulty level of Thermodynamics questions in NTA Abhyas (JEE Main)?

Of the 160 questions analysed for this chapter, 100% are easy, 0% moderate and 0% tough. 2026 had the most, with 0 questions.

4.Which topics in Thermodynamics should I focus on?

All of this chapter's questions come from a single topic: Uncategorized.