CBSE Class 11 Physics Chapter 12 Thermodynamics Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics Thermodynamics with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics Thermodynamics MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics Thermodynamics with Answers - Set - 1
Question 1:
A Carnots engine works as a refrigerator between 250 K and 300 K. If it receives 750 calories of heat from the reservoir at the lower temperature, the amount of heat rejected at the higher temperature is __________.
(a) 900 cal
(b) 625 cal
(c) 750 cal
(d) 1000 cal
Correct Answer – (A)
Question 2 :
The translational kinetic energy of gas molecules at temperature T for one mole of a gas is
(a) (3/2) RT
(b) (9/2) RT
(c) (1/3) RT
(d) (5/2) RT
Correct Answer – (A)
Question 3 :
At a given volume and temperature, the pressure of a gas
(a) varies inversely as its mass
(b) varies inversely as the square of its mass
(c) varies linearly as its mass
(d) is independent of its mass
Correct Answer – (C)
Question 4 :
A black body at a temperature of 227°C radiates heat at the rate of 20 cal m-2s-1. When its temperature rises to 727°C, the heat radiated will be
(a) 40 units
(b) 160 units
(c) 320 units
(d) 640 units
Correct Answer – (C)
Question 5 :
The temperatures of inside and outside of a refrigerator are 273 K and 303 K respectively. Assuming, that the refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be nearly:
(a) 10 J
(b) 20 J
(c) 30 J
(d) 50 J
Correct Answer – (C)
MCQ Questions Class 11 Physics Thermodynamics with Answers
Question 6 :
Which of the following parameters dose not characterize the thermodynamic state of matter?
(a) work
(b) volume
(c) pressure
(d) Temperature
Correct Answer – (A)
Question 7 :
In a thermodynamic process, pressure of a fixed mass of the gas is changed in such a manner that the gas molecules give out 30 J of heat. Also, 10 J of work is done on the gas. If the internal energy of the gas was 40 J, what will be the final internal energy?
(a) 20 J
(b) -20 J
(c) 80 J
(d) zero
Correct Answer – (A)
Question 8 :
Which of the following is incorrect regarding the first law of thermodynamics? A. It is not applicable to any cyclic process B. It is a restatement of the principle of conservation of energy C. It introduces the concept of the internal energy D. It introduces the concept of the entropy
(a) A and D
(b) B and C
(c) C and A
(d) A and B
Correct Answer – (A)
Question 9 :
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of the source is:
(a) 124°C
(b) 37°C
(c) 62°C
(d) 99°C
Correct Answer – (D)
Question 10 :
A thermodynamical system is changed from state (P1, V1) to (P², V²) by two different processes, the quantity which will remain same is:
(a) ΔQ
(b) ΔW
(c) ΔQ + ΔW
(d) ΔQ – ΔW
Correct Answer – (D)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
