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Physics - Thermal Properties of Matter

Practise 50 AIIMS previous year questions on Thermal Properties of Matter, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Thermal Properties of Matter has been asked in 17 of the 19 years of AIIMS papers analysed (2001–2019), with 50 questions in all. 54% of them were easy, 34% moderate and 12% tough. Most of its questions came from 2001, with 8 questions that year. In the last three years (2017–2019) it had 3 questions across 5 papers, about 0.6 per paper.

The chapter's 6 topics are not weighted equally: Radiation (25 questions, 50%), Conduction (9 questions, 18%), and Calorimetry (9 questions, 18%) have been asked the most. Radiation has produced the most tough questions (3).

  1. 1Calculate radiation power for sphere whose temperature is , radius and emissivity 0.8 .25 May, 2019Radiation
  2. 2Assertion : Coefficient of thermal conductivity of a metal rod is a function of length of the rod. Reason : Longer the rod, larger is the am25 May, 2019Conduction
  3. 3A body initially at cools to in and to in . The temperature of the surrounding is2017Radiation
  4. 4The temperature of a body is increased from to . Then the ratio of emissive power is2016Radiation
  5. 5Assertion : The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite. Reason : Specific heat of g2016Calorimetry
  6. 6If oficeis added to of water at , then the temperature ofthemixture is (specificheat of water , Latentheatoffusion of ice )2015Calorimetry
  7. 7A copper ball in radius is heated in a furnace to . If its emissivity is 0.3 , at what rate does it radiate energy?2015Radiation
  8. 8Assertion: UV radiation causes photo dissociation of ozone into and , thus causing damage to the stratospheric ozone layer. Reason : Ozone h2015Radiation
  9. 9Assertion : A hollow metallic closed container with small opening maintained at a high temperature can act as a source of black body radiati2015Radiation
  10. 10Assertion : The conductivity of an electrolyte is very low as compared to a metal at room temperature. Reason : The number density of free i2015Conduction
  11. 11of steam is sent into of ice. At thermal equilibrium, the resultant temperature of mixture is2013Calorimetry
  12. 12Two conductors having same width and length, thickness and , thermal conductivity and are placed one above the another. Find the equivalent 2012Conduction
  13. 13Assertion : Maximum air flow due to convection does not occur at the north pole but it occurs at Reason : There is maximum temperature diffe2012Convection
  14. 14Emissive and absorptive power of a material at is 8 and 10 respectively, calculate the emissivity of IBB (Ideal black body)2011Radiation
  15. 15The latent heat of vaporisation of a substance is always2010Calorimetry
  16. 16Assertion : Water kept in an open vessel will quickly evaporate on the surface of the moon. Reason : The temperature at the surface of the m2010Calorimetry
  17. 17Light with an energy flux of falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is2009Radiation
  18. 18Assertion : Liquid molecules have greater potential energy at the melting point. Reason: Intermolecular spacing between molecules increases 2009Calorimetry
  19. 19Assertion : When hot water is poured in a beaker of thick glass, the beaker cracks. Reason : Outer surface of the beaker expands suddenly.2009Thermal Expansion
  20. 20A slab consists of two layers of different materials of the same thickness and having thermal conductivities \(K_1\) and \(K_2\) are connect2008Conduction
  21. 21If the temperature of a black body increases from \(7^{ } {C}\) to \(287^{ } {C}\) then the rate of energy radiation increases by2007Radiation
  22. 22Assertion : A hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation. Reason : All2007Radiation
  23. 23Assertion : A brass tumbler feels much colder than a wooden tray on a chilly day. Reason : The thermal conductivity of brass is more than th2007Conduction
  24. 24Three objects coloured black, gray and white can withstand hostile conditions upto . These objects are thrown into a furnace where each of t2006Radiation
  25. 25When you make ice cubes, the entropy of water2006Calorimetry
  26. 26A bimetallic strip consists of metals and . It is mounted rigidly at the base as shown. The metal has a higher coefficient of expansion comp2006Thermal Expansion
  27. 27Assertion : Perspiration from human body helps in cooling the body. Reason : A thin layer of water on the skin enhances its emissivity.2006Radiation
  28. 28Assertion : A body that is a good radiator is also a good absorber of radiation at a given wavelength. Reason : According to Kirchoff's law 2005Radiation
  29. 29Assertion : In pressure-temperature phase diagram of water, the slope of the melting curve is found to be negative. Reason : Ice contracts o2005Calorimetry
  30. 30Assertion : For higher temperatures the peak emission wavelength of a black body shifts to lower wavelengths. Reason : Peak emission wavelen2005Radiation
  31. 31Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present valu2004Radiation
  32. 32Assertion : In a pressure cooker the water is brought to boil. The cooker is then removed from the stove. Now on removing the lid of the pre2004Calorimetry
  33. 33A black body, at a temperature of , radiates heat at a rate of . When its temperature is raised to , the heat radiated by it in cal will be 2003Radiation
  34. 34Shown below are the black body radiation curves at temperatures and . Which of the following plots is correct?2003Radiation
  35. 35Assertion : Temperatures near the sea coast are moderate. Reason : Water has a high thermal conductivity.2003Conduction
  36. 36Assertion : It is hotter over the top of a fire than at the same distance on the sides. Reason : Air surrounding the fire conducts more heat2003Convection
  37. 37The density of a substance at is and at , its density is . The coefficient of linear expansion of the substance is2002Thermal Expansion
  38. 38According to Wein's displacement law2002Radiation
  39. 39A black body is at a temperature . It emits energy at a rate, which is proportional to2002Radiation
  40. 40Assertion : Blue star is at high temperature than red star. Reason : Wein's displacement law states that .2002Radiation
  41. 41Assertion : The earth without its atmosphere would be inhospitably cold. Reason : All heat would escape in the absence of atmosphere.2002Radiation
  42. 42Assertion : Woolen clothes keep the body warm in winter. Reason : Air is a bad conductor of heat.2002Conduction
  43. 43Colour of a star depends upon2001Radiation
  44. 44A solid sphere and a hollow sphere are heated the same temperature. Point out the true statement.2001Radiation
  45. 45of heat flowing through a rod of iron. When the rod is cut down to 4 pieces then what will be the heat flowing through each piece having sam2001Conduction
  46. 46Temperature of the star is determined by2001Radiation
  47. 47If hot water is mixed with cold water2001Thermometry
  48. 48Antimony and Bismuth are usually used in thermocouple, because2001Conduction
  49. 49A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice-cold water, and 67 units in a boiling liquid2001Thermometry
  50. 50For an enclosure maintained at , the maximum radiation occurs at wavelength . If the temperature is raised to , the peak will shift to2001Radiation

Frequently Asked Questions

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

This chapter includes 50 questions compiled from AIIMS papers spanning 2001 to 2019.

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

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

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

Thermal Properties of Matter has appeared in 17 of the 19 years of AIIMS papers covered here, with 50 questions across 17 papers - about 3 per paper it appears in.

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

Of the 50 questions analysed for this chapter, 54% are easy, 34% moderate and 12% tough. 2001 had the most, with 8 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 - 25 questions (50%)
  • Conduction - 9 questions (18%)
  • Calorimetry - 9 questions (18%)
  • Radiation has produced the most tough questions (3).
6.Is Thermal Properties of Matter's weightage in AIIMS going up or down?

Across all 17 papers analysed, Thermal Properties of Matter has averaged about 2.9 questions per paper. In the last three years (2017–2019), that average has fallen, at about 0.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.