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Physics - Thermal Properties of Matter

Practise 54 NEET 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 NEET tests.

Thermal Properties of Matter has been asked in 22 of the 39 years of NEET papers analysed (1988–2026), with 54 questions in all. 44% of them were easy, 41% moderate and 15% tough. Most of its questions came from 2016, with 5 questions that year. In the last three years (2024–2026) it had 2 questions across 13 papers, about 0.2 per paper.

The chapter's 5 topics are not weighted equally: Radiation (23 questions, 43%), Conduction (13 questions, 24%), and Calorimetry (8 questions, 15%) have been asked the most. Over the last five years the most frequent topics have been Conduction (2) and Thermal Expansion (1). Radiation has produced the most tough questions (3).

  1. 1The temperature of a metallic sphere of radius is increased by a small amount . If the linear coefficient of thermal expansion of the metal 2026 (Re-NEET)Thermal Expansion
  2. 2Three identical heat conducting rods are connected in series as shown in the figure. The rods on the sides have thermal conductivity while t2025Conduction
  3. 3Two rods one made of copper and other made of steel of the same length and same cross sectional area are joined together. The thermal conduc2022 (Phase 2)Conduction
  4. 4A cup of coffee cools from 90 C to 80 C in t min , when the room temperature is 20 C . The time taken by a similar cup of coffee to cool fro2021Radiation
  5. 5The quantities of heat required to raise the temperature of two solid copper spheres of radii r 1 and r 2 r 1 = 1.5 r 2 through 1 K are in t2020 (Phase 1)Calorimetry
  6. 6Three stars A , B , C have surface temperatures T A , T B , T C respectively. Star A appears bluish, star B appears reddish and star C yello2020 (Phase 2)Radiation
  7. 7A copper rod of 88 c m and an aluminum rod of unknown length have their increase in length independent of increase in temperature. The lengt2019 (All India)Thermal Expansion
  8. 8An object kept in a large room having air temperature of takes 12 minutes to cool from to . The time taken to cool for the same object from 2019 (Odisha)Radiation
  9. 9A deep rectangular pond of surface area , containing water (density , specific heat capacity ), is located in a region where the outside air2019 (Odisha)Conduction
  10. 101 g of water, of volume at is converted into steam at same temperature under normal atmospheric pressure . The volume of steam formed equals2019 (Odisha)Calorimetry
  11. 11The power radiated by a black body is P and it radiates maximum energy at wavelength, 0 . If the temperature of the black body is now change2018Radiation
  12. 12A sample of 0.1 g of water at 100 o C and normal pressure 1.013 10 5 N m - 2 requires 54 cal of heat energy to convert to steam at 100 o C .2018Calorimetry
  13. 13Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K 1 and K 2 . The thermal c2017Conduction
  14. 14A spherical black body with a radius of 12 cm radiates 450 W power at 500 K . If the radius were halved and the temperature doubled, the pow2017Radiation
  15. 15A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U 1 , at wavelength 500 nm i2016 (Phase 1)Radiation
  16. 16Coefficient of linear expansion of brass and steel rods are 1 and 2 . Lengths of brass and steel rods are l 1 and l 2 , respectively. If l 22016 (Phase 1)Thermal Expansion
  17. 17A 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 energ2016 (Phase 1)Calorimetry
  18. 18Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100 o C , while the o2016 (Phase 2)Thermometry
  19. 19A body cools from a temperature 3 T to 2 T in 10 minutes. The room temperature is T . Assume that Newton's law of cooling is applicable. The2016 (Phase 2)Radiation
  20. 20On observing light from three different stars P , Q and R , it was found that intensity of violet colour is maximum in the spectrum of P , t2015 (Phase 1)Radiation
  21. 21The two ends of a metal rod are maintained at temperatures 100 ° C and 110 ° C . The rate of heat flow in the rod is found to be 4.0 J s - 12015 (Phase 1)Conduction
  22. 22Steam at 100 o C is passed into 20 g of water at 10 o C . When water acquires a temperature of 80 o C , the mass of water present will be: [2014Calorimetry
  23. 23Certain quantity of water cools from 70 o C to 60 o C in the first 5 minutes and to 54 o C in the next 5 minutes. The temperature of the sur2014Radiation
  24. 24A piece of iron is heated in a flame. If first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct expl2013 (All India)Radiation
  25. 25Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are and and crossse2013 (Karnataka)Conduction
  26. 26The density of water at in and at a . The cocfficient of volume expansion of water is:2013 (Karnataka)Thermal Expansion
  27. 27A slab of stone of area of and thickness is exposed on the lower surface to steam at . A block of ice at rests on the upper surface of the s2012 (Mains)Conduction
  28. 28If the radius of a star is and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is2012 (Screening)Radiation
  29. 29Liquid oxygen at is heated to at constant pressure of 1 atm. The rate of heating is constant. Which one of the following graphs represents t2012 (Screening)Calorimetry
  30. 30The thermo emf in volt of a certain thermo-couple is found to vary with temperature difference in between the two junctions according to the2010 (Mains)Thermometry
  31. 31A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat in time t. The metallic2010 (Screening)Conduction
  32. 32The total radiant energy per unit area, normal to the direction of incidence, received at a distance from the centre of a star of radius , w2010 (Screening)Radiation
  33. 33The two ends of a rod of length and a uniform cross-sectional area A are kept at two temperatures and . The rate of heat transfer, , through2009 (Mains)Conduction
  34. 34A black body at radiates heat at the rate of . At a temperature of , the rate of heat radiated in the same units will be :2009 (Mains)Radiation
  35. 35A black body at radiates heat at the rate of . At a temperature of , the rate of heat radiated in the same units will be2009 (Screening)Radiation
  36. 36The two ends of a rod of length and a uniform cross-sectional area are kept at two temperatures and . The rate of heat transfer, , through t2009 (Screening)Conduction
  37. 37On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are and respectively. What 2008 (Mains)Thermometry
  38. 38An electric kettle takes current at . How much time will it take to boil of water from temperature ? The temperature of boiling water is .2008 (Mains)Calorimetry
  39. 39Оп a new scale of temperature (which is linear) and called the scale, the freezing and boiling points of water are and respectively. What wi2008 (Screening)Thermometry
  40. 40An electric kettle takes current at . How much time will it take to boil of water from temperature ? The temperature of boiling water is2008 (Screening)Calorimetry
  41. 41A black body is at . It emits energy at a rate which is proportional to:2007Radiation
  42. 42If the cold junction of thermocouple is kept at and the hot junction is kept at , then the relation between neutral temperature and temperat2007Thermometry
  43. 43Assuming the sun to have a spherical outer surface of radius , radiating like a black body at temperature , the power received by a unit sur2007Radiation
  44. 44A black body at emits radiations with maximum intensity at a wavelength of . If the temperature of the body is increased by , the maximum in2006Radiation
  45. 45Which of the following rods, (given radius and length ) each made of the same material and whose ends are maintained at the same temperature2005Conduction
  46. 46The temperature of inversion of a thermocouple is and the neutral temperature is . What is the temperature of cold junction?2005Thermometry
  47. 47If denotes the wavelength at which the radioactive emission from a black body at a temperature is maximum, then:2004Radiation
  48. 48We consider the radiation emitted by the human body. Which one of the following statement is true?2003Radiation
  49. 49Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities and , respectively. The equ2003Conduction
  50. 50The Wien's displacement law expresses the relation between:2002Radiation

Frequently Asked Questions

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

This chapter includes 54 questions compiled from NEET papers spanning 2002 to 2026.

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

These are NEET questions specifically for the Thermal Properties of Matter chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

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

Thermal Properties of Matter has appeared in 22 of the 25 years of NEET papers covered here, with 54 questions across 30 papers - about 2 per paper it appears in.

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

Of the 54 questions analysed for this chapter, 44% are easy, 41% moderate and 15% tough. 2016 had the most, with 5 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:

  • Radiation - 23 questions (43%)
  • Conduction - 13 questions (24%)
  • Calorimetry - 8 questions (15%)
  • Radiation has produced the most tough questions (3).
6.Is Thermal Properties of Matter's weightage in NEET going up or down?

Across all 30 papers analysed, Thermal Properties of Matter has averaged about 1.8 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.