# MCQ Questions For Class 11 Physics Chapter 11 Thermal Properties of Matter

Thermal Properties of Matter Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQ on Thermal Properties of Matter Class 11, which will help them all through their board test.

## Thermal Properties of Matter Class 11 MCQ Questions with Answer

Class 11 Physics MCQ with answers are given here to Chapter 11 Thermal Properties of Matter. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 Physics syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 Thermal Properties of Matter MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Physics Thermal Properties of Matter MCQ with answers given below

Question 1. The absolute zero is the temperature at which :
(a) all substances exist in solid state
(b) molecular motion ceases
(c) water freezes
(d) none of these

B

Question 2. A quantity of heat required to change the unit mass of a solid substance to its liquid state, while the temperature remains constant, is known as
(a) latent heat of vaporation
(b) latent heat of fusion
(c) heat of condensation
(d) specific heat

B

Question 3. The instrument used to measure the temperature of the source from its thermal radiation is :
(a) hydrometer
(b) barometer
(c) thermopile
(d) pyrometer

C

Question 4. The surface temperature of a body is 727°C and that of another body is 327°C. The ratio of total energies radiated by them is :
(a) 625 : 81
(b) 125 : 27
(c) 8 : 27
(d) 9 : 25

A

Question 5. When a solid is converted into a gas, directly by heating then this process is known as:
(a) Sublimation
(b) Vaporization
(c) Condensation
(d) Boiling

A

Question 6. Woolen clothes keep the body warm because the wool :
(a) decreases the temperature of the body
(b) is a good conductor of heat
(c) increases the temperature of the body
(d) is a bad conductor of heat

D

Question 7. Heat travels through vacuum by :
(a) convection
(c) conduction
(d) all of these

B

Question 8. The colour of a star indicates its :
(a) velocity
(b) temperature
(c) size
(d) length

B

Question 9. The sun emits a light with maximum wave length 510 nm while another star emits a light with maximum wavelength of 350 nm. The ratio of surface temperature of sun and the star will be :
(a) 0.68
(b) 2.1
(c) 1.45
(c) 0.46

A

Question 10. The real coefficient of volume expansion of glycerine is 0.000597 per°C and linear coefficient of expansion of glass is 0.000009 per °C. Then the apparent volume coefficient of expansion of glycerine is
(a) 0.000558 per °C
(b) 0.00057 per °C
(c) 0.00027 per °C
(d) 0.00066 per °C

B

Question 11. The density of a substance at 0°C is 10 g/cc and at 100°C, its density is 9.7 g/cc. The coefficient of linear expansion of the substance is
(a) 10–2
(b) 10–2
(c) 10–3
(d) 10–4

A

Question 12. A black body is heated from 27°C to 127°C. The ratio of their energies of radiation emitted will be:
(a) 9 : 16
(b) 27 : 64
(c) 81 : 256
(d) 3 : 4

C

Question 13. A black body is at a temperature 300 K. It emits energy at a rate, which is proportional to
(a) (300)4
(b) (300)3
(c) (300)2
(d) 300

A

Question 14. Three objects colored black, gray and white can withstand hostile conditions upto 2800°C. These objects are thrown into a furnace where each of them attains a temperature of 2000°C. Which object will glow brightest?
(a) the white object
(b) the black object
(c) all glow with equal brightness
(d) gray object

B

Question 15. A black body, at a temperature of 227°C, radiates heat at a rate of 20 cal m–2s–1. When its temperature is raised to 727°C, the heat radiated by it in cal m–2s–1 will be closest to :
(a) 40
(b) 160
(c) 320
(d) 640

C

Question 16. Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increase by a factor of :
(a) 104
(b) 625
(c) 16
(d) 16

B

Question 17. 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) 32
(b) 16
(c) 4
(d) 64

D

Question 18. If the temperature of a black body increases from 7°C to 287°C then the rate of energy radiation increases by
(a) (287/7 )4
(b) 16
(c) 4
(d) 2

B

Question 19. The wavelength of maximum energy released during an atomic explosion was 2.93 × 10–10 m.
The maximum temperature attained must be, (Weins constant = 2.93 × 10–3 mK)
(a) 5.86 × 107 K
(b) 10–13 K
(c) 10–7 K
(d) 107 K

D

Question 20. A glass flask of volume 1 litre is fully filled with mercury at 0ºC. Both the flask and mercury are now heated to 100ºC. If the coefficient of volume expansion of mercury is 1.82 × 10–4/ºC, volume coefficient of linear expansion of glass is 10 × 10–6/ºC, the amount of mercury which is spilted out is
(a) 15.2 ml
(b) 17.2 ml
(c) 19.2 ml
(d) 21.2 ml

A

Question 21. Steam is passed into 22 g of water at 20°C . The mass of water that will be present when the water acquires a temperature of 90°C is (Latent heat of steam is 540 cal/gm)
(a) 24.8 gm
(b) 24 gm
(c) 36.6 gm
(d) 30 gm

A

Whoever needs to take the CBSE Class 11 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 11 Physics Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Thermal Properties of Matter Class 11 MCQ are ready by the subject specialists themselves.

Question 22. A crystal has a coefficient of expansion 13×10–7 in one direction and 231 × 10–7 in every direction at right angles to it. Then the cubical coefficient of expansion is
(a) 462 × 10–7
(b) 244 × 10–7
(c) 475 × 10–7
(d) 257 × 10–7

A

Question 23. Two identical rods of copper and iron are coated with wax uniformly. When one end of each is kept at temperature of boiling water, the length upto which wax melts are 8.4 cm amd 4.2 cm, respectively. If thermal conductivity of copper is 0.92, then thermal conductivity of iron is
(a) 0.23
(b) 0.46
(c) 0.115
(d) 0.69

A

Question 24. If a bar is made of copper whose coefficient of linear expansion is one and a half times that of iron, the ratio of force developed in the copper bar to the iron bar of identical lengths and cross-sections, when heated through the same temperature range (Young’s modulus of copper may be taken to be equal to that of iron) is
(a) 3/2
(b) 2/3
(c) 9/4
(d) 4/9

A

Question 25. A metallic bar is heated from 0ºC to 100ºC. The coeficient of linear expansion is 10–5 K–1. What will be the percentage increase in length?
(a) 0.01%
(b) 0.1%
(c) 1%
(d) 10%

B

Question 26. The coefficient of thermal conductivity depends upon
(a) temperature difference between the two surfaces.
(b) area of the plate
(c) material of the plate
(d) All of these

C

Question 27. A pendulum clock is 5 seconds fast at temperature of 15ºC and 10 seconds slow at a temperature of 30ºC. At what temperature does it give the correct time? (take time interval =24 hours)
(a) 18ºC
(b) 20ºC
(c) 22ºC
(d) 25ºC

C

Question 28. The fastest mode of transfer of heat is
(a) conduction
(b) convection
(d) None of these

C

Question 29. A sphere, a cube and a thin circular plate, all of same material and same mass are initially heated to same high temperature.
(a) Plate will cool fastest and cube the slowest
(b) Sphere will cool fastest and cube the slowest
(c) Plate will cool fastest and sphere the slowest
(d) Cube will cool fastest and plate the slowest

C

Question 30. A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using
(a) Wien’s displacement law
(b) Kirchoff’s law
(c) Newton’s law of cooling
(d) Stefan’s law

A

Question 31. The wavelength of radiation emitted by a body depends upon
(a) the nature of its surface
(b) the area of its surface
(c) the temperature of its surface
(d) All of the above

D

Question 32. A vessel completely filled with a liquid is heated. If a and g represent coefficient of linear expansion of material of vessel and coefficient of cubical expansion of liquid respectively, then the liquid will not overflow if
(a) g = 3 a
(b) g > 3 a
(c) g < 3 a
(d) g £ 3 a

D

Question 33. On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39°W and 239°W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39°C on the Celsius scale ?
(a) 200°W
(b) 139°W
(c) 78°W
(d) 117°W

D

Question 34. Mercury thermometer can be used to measure temperature upto
(a) 260°C
(b) 100°C
(c) 360°C
(d) 500°C

C

Question 35. The density of water at 20°C is 998 kg/m3 and at 40°C 992 kg/m3. The coefficient of volume expansion of water is
(a) 10–4/°C
(b) 3 × 10–4/°C
(c) 2 × 10–4/°C
(d) 6 × 10–4/°C

B

Question 36. Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K1 and K2 and cross sectional areas A1 and A2, respectively. If the rate of heat conduction in rod 1 is four times that in rod 2, then
(a) K1A1 = K2A2
(b) K1A1 = 4K2A2
(c) K1A1 = 2K2A2
(d) 4K1A1 = K2A2

B

Question 37. The density of water at 20°C is 998 kg/m3 and at 40°C is 992 kg/m3. The coefficient of volume expansion of water is
(a) 3 × 10–4/°C
(b) 2 × 10–4/°C
(c) 6 × 10–4/°C
(d) 10–4/°C

A

Question 38. A Centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°F. What is the fall in temperature as registered by the centigrade thermometer?
(a) 80°C
(b) 60°C
(c) 40°C
(d) 30°C

C

Question 39. The value of coefficient of volume expansion of glycerin is 5 ×10–4 K–1. The fractional change in the density of glycerin for a rise of 40°C in its temperature, is
(a) 0.025
(b) 0.010
(c) 0.015
(d) 0.020

D

Question 40. Certain quantity of water cools from 70°C to 60°C in the first 5 minutes and to 54°C in the next 5 minutes. The temperature of the surroundings is:
(a) 45°C
(b) 20°C
(c) 42°C
(d) 10°C

A

Question 41. Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of water present will be:
[Take specific heat of water = 1 cal g– 1 °C– 1 and latent heat of steam = 540 cal g– 1]
(a) 24 g
(b) 31.5 g
(c) 42.5 g
(d) 22.5 g

D

Question 42. Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100°C, while the other one is at 0°C. If the two bodies are brought into contact, then, assuming no heat loss, the final common temperature is
(a) 50°C
(b) more than 50°C
(c) less than 50°C but greater than 0°C
(d) 0°C

B

Question 43. On 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, the intensity of green colour is maximum in the spectrum of R and the intensity of red colour is maximum in the spectrum of Q. If TP, TQ and TR are the respective absolute temperature of P, Q and R, then it can be concluded from the above observations that
(a) TP > TR > TQ
(b) TP < TR  < TQ
(c) TP < TQ < TR
(d) TP> TQ > TR

A

Question 44. A 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 energy of ice gets converted into heat during its fall. The value of h is [Latent heat of ice is 3.4 × 105 J/ kg and g = 10 N/kg]
(a) 136 km
(b) 68 km
(c) 34 km
(d) 544 km

A

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