Read and download the CBSE Class 11 Physics Thermodynamics Worksheet Set B in PDF format. We have provided exhaustive and printable Class 11 Physics worksheets for Chapter 11 Thermodynamics, designed by expert teachers. These resources align with the 2025-26 syllabus and examination patterns issued by NCERT, CBSE, and KVS, helping students master all important chapter topics.
Chapter-wise Worksheet for Class 11 Physics Chapter 11 Thermodynamics
Students of Class 11 should use this Physics practice paper to check their understanding of Chapter 11 Thermodynamics as it includes essential problems and detailed solutions. Regular self-testing with these will help you achieve higher marks in your school tests and final examinations.
Class 11 Physics Chapter 11 Thermodynamics Worksheet with Answers
Question- If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously, will be
(a) 4
(b) 16
(c) 32
(d) 64
Ans-(d)
Question- Which of the following is incorrect regarding the first law of thermodynamics ?
(a) It introduces the concept of the internal anergy
(b) It introduces the concept of entropy
(c) It is not applicable to any cyclic process
(d) It is a restatement of the principle of conservation of energy
Ans-(b, c)
Question- The work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperatue of the gas increases by 7ºC. The gas is (R = 8.3 J mol–1 K–1)
(a) monoatomic
(b) diatomic
(c) triatornic
Ans-(b)
Question- A Carnot engine, having an efficiency of η = 1/10 as heat engine, is used as a refrigrator. If the work done on the system is 10 J, the amount of energy absorbed from the reservior at lower temperature is
(a) 100 J
(b) 99 J
(c) 90 J
(d) 1J
Ans-(c)
Question- Assume the gas to be ideal the work done by the gas in taking it from A to B is
(a) 200 R
(b) 300 R
(c) 400 R
(d) 500 R
Ans-(c)
Question- The work done by the gas in taking it from D to A is
(a) – 414 R
(b) +414 R
(c) – 690 R
(d) + 690 R
Ans-(a)
Question- The net work by the gas in the cycle ABCDA is
(a) zero
(b) 276 R
(c) 1076 R
(d) 1904 R
Ans-(b)
Question- An aluminium sphere of 20 cm diameter is heated from 0°C to 100°C. Its volume changes by (given that coefficient of linear expansion for aluminium αA1 = 23 × 10–6/°C)
(a) 28.9 cc
(b) 2.89 cc
(c) 9.28 cc
(d) 49.8 cc
Ans-(a)
Question- 100 g of water is heated from 30°C to 50°C. Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is 4184 j/kg/K).
(a) 8.4 kJ
(b) 84 kJ
(c) 2.1 kJ
(d) 4.2 kJ
Ans-(a)
Question- A Carnot engine, whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500 K. If is desired to have an engine of efficiency 60%. Then, the intake temperature for the same exhaust (sink) temperature must be
(a) Efficiency of Carnot engine cannot be made large than 50%
(b) 1200 K
(c) 750 K
(d) 600 K
Ans-(c)
Question- Parallel rays of light of intensity l=912 Wm–2 are incident on a spherical black body kept in surroundings of temperature 300 K. Take Stefan-Boltzmann constant σ= 5.7 × 10–8 Wm–2 K–4 and assume that the energy exchange with the surroundings is only through radiation. The final steady state temperature of the black body is close to
(a) 330 K
(b) 660 K
(c) 990 K
(d) 1550 K
Ans-(a)
Question- Three rods of Copper, Brass and Steel are welded together to form a Y–shaped structure. Area of cross–section of each rod = 4 cm2. End of copper rod is maintained at 100°C where as ends of brass and steel are kept at 0°C. Lengths of the copper, brass and steel rods are 46, 13 and 12 cms respectively. The rods are thermally insulated from surroundings except at ends. Thermal conductivities of copper, brass and steel are 0.92, 0.26 and 0.12 CGS units respectively. Rate of heat flow through copper rod is
(a) 2.4 cal/s
(b) 4.8 cal/s
(c) 6.0 cal/s
(d) 12. cal/s
Ans-(b)
Question- A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 75°C. T is given by : (Given : room temperature = 30°C, specific heat of copper = 0.1 cal/gm°C)
(a) 825°C
(b) 800°C
(c) 885°C
(d) 1250°C
Ans-(c)
Question- Water of volume 2 L in a closed container is heated with a coil of 1 kW. While water is heated, the container loses energy at a rate of 160 J/s. In how much time will the temperature of water rise from 27°C to 77°C? (Specific heat of water is 4.2 kJ/kg and that of the container is negligible.)
(a) 8 min 20 s
(b) 6 min 2 s
(c) 7 min
(d) 14 min
Ans-(a)
Question- Hot water cools from 600C to 500C in the first 10 minutes and to 420C in the next 10 minutes. The temperature of the surroundings is:
(a) 100C
(b) 150C
(c) 200C
(d) 250C
Ans-(a)
Question- At room temperature a diatomic gas is found to have an r.m.s. speed of 1930 ms–1. The gas is:
(a) F2
(b) O2
(c) Cl2
(d) H
Ans-(d)
Question- A hot body, obeying Newton’s law of cooling is cooling down from its peak value 800C to an ambient temperature of 300C. It takes 5 minutes in cooling down from 800C to 400C. How much time will it take to cool down from 620C to 320C? (Given ln 2 = 0.693, ln 5 = 1.609)
(a) 3.75 minutes
(b) 8.6 minutes
(c) 6.5 minutes
(d) 9.6 minutes
Ans-(b)
76. A mono atomic gas is compressed from a volume of 2 m3 to a volume of 1 m3 at a constant pressure of 100 N/m2, Then it is heated at constant volume by supplying 150 J of energy. As a result, the internal energy of the gas :
(a) Increases by 250 J
(b) Decreases by 250 J
(c) Decreases by 50 J
(d) remain same
Ans-(d)
78. An experiment take 10 minutes to raise the temperature of water in a container from 0°C to 100°C and another 55 minutes to convert it totally into steam by a heater supplying heat at a uniform rate. Neglecting the specific heat of the container and taking specific heat of water to be 1cal/ g° C, the heat of vapourization according to this experiment will come out to be :
(a) 560 cal/g
(b) 550 cal/g
(c) 540 cal/g
(d) 530 cal/g
Ans-(b)
Question- Heat required to raise the temperature of 54 grams steam (H2O) by 5°C in a rigid & closed vessel is:
(a) 373 Joules
(b) 413 Joules
(c) 512 Joules
(d) 347 Joules
Ans-(a)
Question- 200 g water is heated from 40°C to 60°C. Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of Water = 4184 J/kg/K) :
(a) 8.4 kJ
(b) 4.2 kJ
(c) 16.7 kJ
(d) 167.4 kJ
Ans-(c)
Question- A Carnot’s engine works as a refrigerator between 250 K and 300 K. It receives 500 cal heat from the reservoir at the lower temperature. The amount of work done in each cycle to operate the refrigerator is :
(a) 420 J
(b) 772 J
(c) 2100 J
(d) 2520 J
Ans-(a)
Question- One mole of an ideal monoatomic gas is compressed isothermally in a rigid vessel to double its pressure at room temperature, 270C. The work done on the gas will be :
(a) 300 R
(b) 300 R ln 6
(c) 300 R ln 2
(d) 300 R ln 7
Ans-(c)
Question- A body takes 10 minutes to cool from 600 C to 500 C. The temperature of surroundings is constant at 250 C. Then,the temperature of the body after next 10 minutes will be approximately :
(a) 470 C
(b) 410 C
(c) 450 C
(d) 430 C
Ans-(d)
Question- Find the ratio of the lengths of an iron rod and an aluminium rod for which the difference in the lengths is independent of temperature. Coefficients of linear expansion of iron and aluminium are 12 × 10–6/°C and 23 × 10–6/°C respectively.
(a) 23 : 12
(b) 12 : 23
(c) data insufficient
(d) Not possible
Ans-(a)
Question- A solid ball of metal has a spherical cavity inside it. If the ball is heated the volume of cavity will :
(a) increase
(b) decrease
(c) remain unchanged
(d) data insufficient
Ans-(a)
Question- The coefficient of volume expansion of glycerin is 49 × 10–5 K–1. What is the fractional change in its density for a 30°C rise in temperature ?
(a) increases by 0.015
(b) increases by 0.005
(c) decreases by 0.015
(d) decreases by 0.005
Ans-(c)
Question- An iron ball of mass 0.2 kg is heated to 10°C and put into a block of ice at 0°C. 2.5 g of ice melts. If the latent heat of fusion of ice is 80 cal/g, then the specific heat of iron in cal/g°C is :
(a) 1
(b) 0.1
(c) 0.8
(d) 0.08
Ans-(b)
Question- Equal masses of three liquids A, B and C have temperatures 10°C, 25°C and 40°C respectively. If A and B are mixed, the mixture has a temperature of 15°C. If B and C are mixed, the mixture has a temperature of 30°C. If A and C are mixed, the mixture will have a temperature of:
(a) 16°C
(b) 20°C
(c) 25°C
(d) 29°C
Ans-(a)
Question- A mass of a material exists in its solid form at its melting temperature 10°C. The following processes then occur to the material.
Process I : An amount of thermal energy Q is added to the material and 3/4 of the material melts.
Process II : An identical additional amount of thermal energy Q is added to the material and the material is now a liquid at 50°C.
What is the ratio of the latent heat of fusion to the specific heat of the liquid for this material ?
(a) 80°C
(b) 60°C
(c) 40°C
(d) None of these
Ans-(a)
Question- 50 g of ice at 0°C is mixed with 50 g of water at 60°C, final temperature of mixture will be :
(a) 0°C
(b) 40°C
(c) 10°C
(d) 15°C
Ans-(a)
Question- A block of ice of mass M = 10 kg is moved back and forth over the flat horizontal surface of a large block of ice. Both blocks are at 0°C and the force that produces the back–and –forth motion acts only horizontally. The coefficient of friction between the two surfaces is 0.060. If m = 15.2 g of water is produced, the total distance travelled by the upper block relative to the lower is : (Lice = 3.34 × 105 J/kg)
(a) 432 m
(b) 863 m
(c) 368 m
(d) 216 m
Ans-(b)
Question- What will be the temperature when the rms velocity is double of that at 300 K :
(a) 300 K
(b) 600 K
(c) 900 K
(d) 1200 K
Ans-(d)
Question- During the melting of a slab of ice at 273 K at atmospheric pressure
(a) Positive work is done by ice-water system on the atmosphere
(b) Positive work is done on the ice-water system by the atmosphere
(c) The internal energy of the ice-water system increases
(d) The internal energy of the ice-water system decreases
Ans-(b, c)
Question- When an ideal gas (γ = 5/3) is heated under constant pressure, then what percentage of given heat energy will be utilised in doing external work
(a) 40 %
(b) 30 %
(c) 60 %
(d) 20 %
Ans-(a)
Question- Two samples A and B of a gas initially at the same pressure and temperature are compressed from volume V to V/2 (A isothermally and adiabatically). The final pressure of A is
(a) Greater than the final pressure of B
(b) Equal to the final pressure of B
(c) Less than the final pressure of B
(d) Twice the final pressure of B
Ans-(c)
Question- An ideal gas expands in such a manner that its pressure and volume can be related by equation PV2 = constant. During this process, the gas is
(a) Heated
(b) Cooled
(c) Neither heated nor cooled
(d) First heated and then cooled
Ans-(b)
Question- A wall has two layers A and B, each made of different material.Both the layers have the same thickness. The thermal conductivity for A is twice that of B and, under steady condition, the temperature difference across the wall is 36°C. The temperature difference across the layer A is:
(a) 6°C
(b) 12°C
(c) 24°C
(d) 18°C
Ans-(b)
Question- The length of the two rods made up of the same metal and having the same area of cross-section are 0.6 m 0.8 m and respectively. The temperature between the ends of first rod is 90°C and 60°C and that for the other rod is 150°C and 110°C. For which rod the rate of conduction will be greater
(a) first
(b) second
(c) same for both
(d) none of these
Ans-(c)
Question- The intensity of radiation emitted by the sun its maximum value at a wavelength of 510 nm and that emitted by the North Star has the maximum value at 350 nm. If these stars behave like black bodies, then the ratio of the surface temperature of the sun and North Star is :
(a) 1.46
(b) 0.69
(c) 1.21
(d) 0.83
Ans-(b)
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Important Practice Resources for Class 11 Physics
CBSE Physics Class 11 Chapter 11 Thermodynamics Worksheet
Students can use the practice questions and answers provided above for Chapter 11 Thermodynamics to prepare for their upcoming school tests. This resource is designed by expert teachers as per the latest 2026 syllabus released by CBSE for Class 11. We suggest that Class 11 students solve these questions daily for a strong foundation in Physics.
Chapter 11 Thermodynamics Solutions & NCERT Alignment
Our expert teachers have referred to the latest NCERT book for Class 11 Physics to create these exercises. After solving the questions you should compare your answers with our detailed solutions as they have been designed by expert teachers. You will understand the correct way to write answers for the CBSE exams. You can also see above MCQ questions for Physics to cover every important topic in the chapter.
Class 11 Exam Preparation Strategy
Regular practice of this Class 11 Physics study material helps you to be familiar with the most regularly asked exam topics. If you find any topic in Chapter 11 Thermodynamics difficult then you can refer to our NCERT solutions for Class 11 Physics. All revision sheets and printable assignments on studiestoday.com are free and updated to help students get better scores in their school examinations.
Where can I download the 2025-26 CBSE printable worksheets for Class 11 Physics Chapter Chapter 11 Thermodynamics?
You can download the latest chapter-wise printable worksheets for Class 11 Physics Chapter Chapter 11 Thermodynamics for free from StudiesToday.com. These have been made as per the latest CBSE curriculum for this academic year.
Are these Chapter Chapter 11 Thermodynamics Physics worksheets based on the new competency-based education (CBE) model?
Yes, Class 11 Physics worksheets for Chapter Chapter 11 Thermodynamics focus on activity-based learning and also competency-style questions. This helps students to apply theoretical knowledge to practical scenarios.
Do the Class 11 Physics Chapter Chapter 11 Thermodynamics worksheets have answers?
Yes, we have provided solved worksheets for Class 11 Physics Chapter Chapter 11 Thermodynamics to help students verify their answers instantly.
Can I print these Chapter Chapter 11 Thermodynamics Physics test sheets?
Yes, our Class 11 Physics test sheets are mobile-friendly PDFs and can be printed by teachers for classroom.
What is the benefit of solving chapter-wise worksheets for Physics Class 11 Chapter Chapter 11 Thermodynamics?
For Chapter Chapter 11 Thermodynamics, regular practice with our worksheets will improve question-handling speed and help students understand all technical terms and diagrams.