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Physics - Thermal Properties of Matter

Practise 137 JEE Main previous year questions on Thermal Properties of Matter, compiled from papers spanning 2002 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Main tests.

Thermal Properties of Matter has been asked in 24 of the 25 years of JEE Main papers analysed (2002–2026), with 137 questions in all. 26% of them were easy, 58% moderate and 17% tough. Most of its questions came from 2022, with 18 questions that year. In the last three years (2024–2026) it had 22 questions across 49 papers, about 0.4 per paper.

The chapter's 5 topics are not weighted equally: Calorimetry (40 questions, 29%), Thermal Expansion (35 questions, 26%), and Conduction (27 questions, 20%) have been asked the most. Calorimetry has also led over the last five years, with 20 questions. Thermal Expansion has produced the most tough questions (6).

  1. 1The heat extracted out of gram of water initially at to cool it down to is sufficient to evaporate gram of water also initially at . The val05 Apr, 2026 (E)Calorimetry
  2. 2The temperature of a metal strip having coefficient of linear expansion is increased from to resulting in increase of its length by . The te04 Apr, 2026 (E)Thermal Expansion
  3. 3Which of the following best represents the temperature versus heat supplied graph for water, in the range of to ?28 Jan, 2026 (M)Calorimetry
  4. 410 kg of ice at is added to 100 kg of water to lower its temperature from 25 . Consider no heat exchange to surroundings. The decrement to t28 Jan, 2026 (M)Calorimetry
  5. 5A brass wire of length 2 m and radius 1 mm at is held taut between two rigid supports. Initially it was cooled to a temperature of creating 24 Jan, 2026 (M)Thermal Expansion
  6. 6Rods and of equal dimensions but of different materials are joined as shown in figure. Temperatures of end points and are maintained at and 22 Jan, 2026 (M)Conduction
  7. 7An aluminium and steel rods having same lengths and cross-sections are joined to make total length of 120 cm at . The coefficient of linear 21 Jan, 2026 (M)Thermal Expansion
  8. 8A gas based geyser heats water flowing at the rate of 5.0 litres per minute from to . The rate of consumption of the gas is . (Take heat of 21 Jan, 2026 (M)Calorimetry
  9. 9Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from the water i08 Apr, 2025 (E)Calorimetry
  10. 10A wire of length 10 cm and diameter 0.5 mm is used in a bulb. The temperature of the wire is and power radiated by the wire is 94.2 W. Its e07 Apr, 2025 (M)Radiation
  11. 11Two cylindrical rods A and B made of different materials, are joined in a straight line. The ratio of lengths, radii and thermal conductivit07 Apr, 2025 (E)Conduction
  12. 12Consider a rectangular sheet of solid material of length and width . The coefficient of linear expansion is at room temperature and one atmo04 Apr, 2025 (E)Thermal Expansion
  13. 13A cup of coffee cools from to in t minutes when the room temperature is . The time taken by the similar cup of coffee to cool from to at the29 Jan, 2025 (E)Radiation
  14. 14Which of the following figure represents the relation between Celsius and Fahrenheit temperatures ?24 Jan, 2025 (E)Thermometry
  15. 15The temperature of a body in air falls from to in 4 minutes. The temperature of the air is . The temperature of the body in the next 4 minut24 Jan, 2025 (E)Thermometry
  16. 16A gun fires a lead bullet of temperature 300 K into a wooden block. The bullet having melting temperature of 600 K penetrates into the block23 Jan, 2025 (M)Calorimetry
  17. 17An amount of ice of mass and temperature is transformed to vapour of temperature by applying heat. The total amount of work required for thi22 Jan, 2025 (M)Calorimetry
  18. 18Two spherical bodies of same materials having radii 0.2 m and 0.8 m are placed in same atmosphere. The temperature of the smaller body is 8022 Jan, 2025 (M)Radiation
  19. 19Three conductors of same length having thermal conductivity and are connected as shown in figure. Area of cross sections of and conductor ar22 Jan, 2025 (M)Conduction
  20. 20At room temperature , the resistance of a heating element is . The temperature coefficient of the material is . The temperature of the eleme09 Apr, 2024 (E)Thermal Expansion
  21. 21The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are and respectively. After inser04 Apr, 2024 (M)Thermal Expansion
  22. 22On celcius scale the temperature of body increases by . The increase in temperature on Fahrenheit scale is :04 Apr, 2024 (M)Thermometry
  23. 23Two conductors have the same resistances at 0 ° C but their temperature coefficients of resistance are α 1 and α 2 . The respective temperat31 Jan, 2024 (M)Conduction
  24. 24A block of ice at - 10 ° C is slowly heated and converted to steam at 100 ° C . Which of the following curves represent the phenomenon quali30 Jan, 2024 (E)Calorimetry
  25. 25Two plates A and B have thermal conductivities 84 W m - 1 K - 1 and 126 W m - 1 K - 1 respectively. They have same surface area and same thi13 Apr, 2023 (E)Conduction
  26. 26A body cools from 80 o C to 60 o in 5 minutes. The temperature for the surrounding is 20 o C . The time it takes to cool from 60 o C to 40 o12 Apr, 2023 (M)Radiation
  27. 271 kg of water at 100 C is converted into steam at 100 C by boiling at atmospheric pressure. The volume of water changes from 1 . 00 10 - 3 m11 Apr, 2023 (M)Calorimetry
  28. 28On a temperature scale X , the boiling point of water is 65 X and the freezing point is - 15 X . Assuming that the X scale is linear. The eq11 Apr, 2023 (M)Thermometry
  29. 29A steel rod of length 1 m and cross-sectional area 10 - 4 m 2 is heated from 0 C to 200 C without being allowed to extend or bend. The compr08 Apr, 2023 (E)Thermal Expansion
  30. 30A body cools in 7 minutes from 60 o C to 40 o C . The temperature of the surrounding is 10 o C . The temperature of the body after the next 06 Apr, 2023 (E)Radiation
  31. 31A thin rod having a length of 1 m and area of cross-section 3 10 - 6 m 2 is suspended vertically from one end. The rod is cooled from 210 C 31 Jan, 2023 (M)Thermal Expansion
  32. 32A water heater of power 2000 W is used to heat water. The specific heat capacity of water is 4200 J kg - 1 K - 1 . The efficiency of heater 31 Jan, 2023 (E)Calorimetry
  33. 33A faulty thermometer reads 5 C in melting ice and 95 C in steam. The correct temperature on absolute scale will be ______ K when the faulty 30 Jan, 2023 (E)Thermometry
  34. 34A body cools from 60 C to 40 C in 6 minutes. If, temperature of surroundings is 10 C . Then, after the next 6 minutes, its temperature will 29 Jan, 2023 (M)Radiation
  35. 35Heat energy of 184 kJ is given to ice of mass 600 g at - 12 C , Specific heat of ice is 2222 . 3 J kg 1 C 1 and latent heat of ice is 336 kJ29 Jan, 2023 (E)Calorimetry
  36. 36A bowl filled with very hot soup cools from 98 C to in 2 minutes when the room temperature is . How long it will take to cool from to ?25 Jan, 2023 (M)Radiation
  37. 37According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one addition25 Jan, 2023 (E)Calorimetry
  38. 38The graph between two temperature scales P and Q is shown in the figure. Between upper fixed point and lower fixed point there are 150 equal25 Jan, 2023 (E)Thermometry
  39. 39A hole is drilled in a metal sheet. At 27 C , the diameter of hole is 5 cm . When the sheet is heated to 177 C , the change in the diameter 24 Jan, 2023 (M)Thermal Expansion
  40. 40Two metallic wires of identical dimensions are connected is series. If 1 and 2 are the conductivities of the these wires respectively, the e29 Jul, 2022 (M)Conduction
  41. 41Nearly 10 % of the power of a 110 W light bulb is converted to visible radiation. The change in average intensities of visible radiation, at29 Jul, 2022 (E)Radiation
  42. 42If K 1 and K 2 are the thermal conductivities L 1 and L 2 are the lengths and A 1 and A 2 are the cross sectional areas of steel and copper 27 Jul, 2022 (M)Conduction
  43. 43An ice cube of dimensions 60 cm 50 cm 20 cm is placed in an insulation box of wall thickness 1 cm . The box keeping the ice cube at 0 C of t26 Jul, 2022 (E)Calorimetry
  44. 44A unit scale is to be prepared whose length does not change with temperature and remains 20 cm , using a bimetallic strip made of brass and 25 Jul, 2022 (M)Thermal Expansion
  45. 45A block of ice of mass 120 g at temperature 0 C is put in 300 g of water at 25 C . The x g of ice melts as the temperature of the water reac25 Jul, 2022 (E)Calorimetry
  46. 46A cylinder of fixed capacity of 44 . 8 litres contains helium gas at standard temperature and pressure. The amount of heat needed to raise t29 Jun, 2022 (M)Calorimetry
  47. 47As per the given figure, two plates A and B of thermal conductivity K and 2 K are joined together to form a compound plate. The thickness of29 Jun, 2022 (M)Conduction
  48. 48At what temperature a gold ring of diameter 6 . 230 cm be heated so that it can be fitted on a wooden bangle of diameter 6 . 241 cm ? Both t29 Jun, 2022 (E)Thermal Expansion
  49. 49Resistance of the wire is measured as 2 and 3 at 10 C and 30 C respectively. Temperature coefficient of resistance of the material of the wi28 Jun, 2022 (E)Conduction
  50. 50A lead bullet penetrates into a solid object and melts. Assuming that 40 % of its kinetic energy is used to heat it, the initial speed of bu27 Jun, 2022 (E)Calorimetry

Frequently Asked Questions

1.How many questions are available for Thermal Properties of Matter?

This chapter includes 137 questions compiled from JEE Main papers spanning 2002 to 2026.

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

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

3.Is Thermal Properties of Matter an important chapter for JEE Main Physics?

Thermal Properties of Matter has appeared in 24 of the 25 years of JEE Main papers covered here, with 137 questions across 105 papers - about one per paper it appears in.

4.What is the difficulty level of Thermal Properties of Matter questions in JEE Main?

Of the 137 questions analysed for this chapter, 26% are easy, 58% moderate and 17% tough. 2022 had the most, with 18 questions.

5.Which topics in Thermal Properties of Matter should I focus on?

These topics have carried the most weightage in Thermal Properties of Matter:

  • Calorimetry - 40 questions (29%)
  • Thermal Expansion - 35 questions (26%)
  • Conduction - 27 questions (20%)
  • Thermal Expansion has produced the most tough questions (6).
6.Is Thermal Properties of Matter's weightage in JEE Main going up or down?

Across all 105 papers analysed, Thermal Properties of Matter has averaged about 1.3 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.