Physics - Thermal Properties of Matter
Practise 32 WBJEE previous year questions on Thermal Properties of Matter, compiled from papers spanning 2009 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 WBJEE tests.
Thermal Properties of Matter has been asked in 15 of the 18 years of WBJEE papers analysed (2009–2026), with 32 questions in all. 25% of them were easy, 56% moderate and 19% tough. Most of its questions came from 2014, with 5 questions that year. In the last three years (2024–2026) it had 3 questions across 3 papers, about 1 per paper.
The chapter's 5 topics are not weighted equally: Calorimetry (12 questions, 38%), Radiation (9 questions, 28%), and Conduction (5 questions, 16%) have been asked the most. Over the last five years the most frequent topics have been Radiation (2) and Thermal Expansion (1). Calorimetry has produced the most tough questions (3).
- 1Two identical metal bars are heated in two different temperature and allowed to cool in the same surroundings. Which one of the following fi2026Radiation
- 2Temperature of a body is slightly more than the temperature of the surrounding . Its rate of cooling ( ) versus temperature of the body is p2025Radiation
- 3The apparent coefficient of expansion of a liquid, when heated in a copper vessel is and when heated in silver vessel is S . If A is linear 2025Thermal Expansion
- 4of water at is added to of ice at . The final temperature of the mixture is2021Calorimetry
- 5When of boiling water at is added into a calorimeter containing of cold water at , temperature of the mixture becomes . Then a metallic bloc2020Calorimetry
- 6Consider an engine that absorbs 130 cal of heat from a hot reservoir and delivers 30 cal heat to a cold reservoir in each cycle. The engine 2020Calorimetry
- 7Two black bodies and have equal surface areas and are maintained at temperatures and respectively. What will be the ratio of the thermal ene2019Radiation
- 8A horizontal fire hose with a nozzle of cross-sectional arca delivers a cubic metre of water in 10 s. What will be the maximum possible incr2019Calorimetry
- 9The water equivalent of a calorimeter is and it contains of water at . Some amount of ice, initially at is dropped in it and half of the ice2018Calorimetry
- 10A solid rectangular sheet has two different coefficients of linear expansion and along its length and breadth respectively. The coefficient 2017Thermal Expansion
- 11If the temperature of the Sun gets doubled, the rate of energy received on the Earth will increase by a factor of2016Radiation
- 12The temperature of the water of a pond is while that of the surrounding atmosphere is . If the density of ice is coefficient of thermal cond2016Conduction
- 13The temperature of a blackbody radiation enclosed in a container of volume is increased from to . The heat required in the process is2016Radiation
- 14Three bodies of the same material and having masses and are at temperatures and respectively. If the bodies are brought in thermal contact, 2015Calorimetry
- 15A solid maintained at is kept in an evacuated chamber at temperature The rate of heat absorbed by the body is proportional to2015Radiation
- 16A scientist proposes a new temperature scale in which the ice point is is the new unit of temperature) and the steam point is . The specific2014Thermometry
- 17In which of the following phenomena, the heat waves travel along straight lines with the speed of light?2014Conduction
- 18Consider a black body radiation in a cubical box at absolute temperature . If the length of each side of the box is doubled and the temperat2014Radiation
- 19Same quantity of ice is filled in each of the two metal containers and having the same size, shape and wall thickness but made of different 2014Calorimetry
- 2010 W electric heater is used to heat a container filled with of water. It is found that the temperature of water and the container rises by 2014Calorimetry
- 21The specific heat of a solid at low temperature shows temperature dependence according to the relation , where is a constant and is the temp2013Conduction
- 22In a mercury thermometer, the ice point (lower fixed point) is marked as and the steam point (upper fixed point) is marked as . At temperatu2012Thermometry
- 2322320 cal of heat is supplied to 100 g of ice at . If the latent heat of fusion of ice is 80 cal and latent heat of vaporization of water is2012Calorimetry
- 24Two temperature scales \( {A}\) and \( {B}\) are related by \( { {A}-42}{110}= { {B}-72}{220}\). At which temperature two scales have the sa2011Thermometry
- 25\(1.56 10^5 {~J}\) of heat is conducted through a \(2 {~m}^2\) wall of \(12 {~cm}\) thick in one hour. Temperature difference between the tw2011Conduction
- 26Experimental investigations show that the intensity of solar radiation is maximum for a wavelength in the visible region. Estimate the surfa2010Radiation
- 27A block of ice at temperature is slowly heated and converted to steam at . Which of the following diagram is most appropriate?2010Calorimetry
- 28Two black bodies at temperatures and are kept in an evacuated chamber at . The ratio of their rates of loss of heat are :2010Radiation
- 29Two rods of equal length and diameter have thermal conductivities 3 and 4 units respectively. If they are joined in series, the thermal cond2009Conduction
- 30of water at and of ice at are mixed together in a calorimeter. What is the final temperature of the mixture? Given specific heat of ice and 2009Calorimetry
- 31It is difficult to cook rice in an open vessel by boiling it at high altitudes because of2009Thermometry
- 32The height of a waterfall is . If the difference between the temperature at the top and the bottom of the waterfall is:2009Calorimetry
Frequently Asked Questions
1.How many questions are available for Thermal Properties of Matter?
This chapter includes 32 questions compiled from WBJEE papers spanning 2009 to 2026.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE questions specifically for the Thermal Properties of Matter chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Thermal Properties of Matter an important chapter for WBJEE Physics?
Thermal Properties of Matter has appeared in 15 of the 18 years of WBJEE papers covered here, with 32 questions across 15 papers - about 2 per paper it appears in.
4.What is the difficulty level of Thermal Properties of Matter questions in WBJEE?
Of the 32 questions analysed for this chapter, 25% are easy, 56% moderate and 19% tough. 2014 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:
- Calorimetry - 12 questions (38%)
- Radiation - 9 questions (28%)
- Conduction - 5 questions (16%)
- Calorimetry has produced the most tough questions (3).
6.Is Thermal Properties of Matter's weightage in WBJEE going up or down?
Across all 15 papers analysed, Thermal Properties of Matter has averaged about 2.1 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.