{"id":17552,"date":"2022-05-24T10:00:52","date_gmt":"2022-05-24T04:30:52","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=17552"},"modified":"2022-05-24T10:49:15","modified_gmt":"2022-05-24T05:19:15","slug":"mcq-questions-for-class-11-physics-chapter-12","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/mcq-questions-for-class-11-physics-chapter-12\/","title":{"rendered":"MCQ Questions for Class 11 Physics Chapter 12 Thermodynamics with Answers"},"content":{"rendered":"

Students are advised to practice the\u00a0NCERT MCQ Questions for Class 11 Physics Chapter 12 Thermodynamics with Answers Pdf free download is available here. MCQ Questions for Class 11 Physics with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Thermodynamics Class 11 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Thermodynamics Class 11 MCQs Questions with Answers<\/h2>\n

Solving the Thermodynamics Multiple Choice Questions of Class 11 Physics Chapter 12 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Thermodynamics Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 12 Physics Class 11 and cross-check your answers during preparation.<\/p>\n

Question 1.
\nA vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of the average rotational kinetic energy per O\u00b2 to per N\u00b2 molecule is
\n(a) 1 : 1
\n(b) 1 : 2
\n(c) 2 : 1
\n(d) depends on the moment of inertia of the two molecules<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 1 : 1<\/p>\n<\/details>\n

\n

Question 2.
\nFor a diatomic gas change in internal energy for a unit change in temperature for constant pressure and constant volume is U1 and U2 respectively. What is the ratio of U1 and U2?
\n(a) 5 : 3
\n(b) 3 : 5
\n(c) 1 : 1
\n(d) 5 : 7<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 1 : 1<\/p>\n<\/details>\n

\n

Question 3.
\nAn ideal gas heat engine operates in Carnot cycle between 227\u00b0C and 127\u00b0C. It absorbs 6 \u00d7 104 cal of heat at higher temperature. Amount of heat converted to work is:
\n(a) 2.4 \u00d7 104 cal
\n(b) 6 \u00d7 104 cal
\n(c) 1.2 \u00d7 104 cal
\n(d) 4.8 \u00d7 104 cal<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 1.2 \u00d7 104 cal<\/p>\n<\/details>\n

\n

Question 4.
\nWhich of the following parameters dose not characterize the thermodynamic state of matter?
\n(a) work
\n(b) volume
\n(c) pressure
\n(d) temperature<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) work<\/p>\n<\/details>\n

\n

Question 5.
\nA Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased, so as to increase its efficiency by 50% of original efficiency?
\n(a) 275 K
\n(b) 325 K
\n(c) 250 K
\n(d) 380 K<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 250 K<\/p>\n<\/details>\n

\n

Question 6.
\nThe translational kinetic energy of gas molecules at temperature T for one mole of a gas is
\n(a) (3\/2) RT
\n(b) (9\/2) RT
\n(c) (1\/3) RT
\n(d) (5\/2) RT<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) (3\/2) RT<\/p>\n<\/details>\n

\n

Question 7.
\nThe temperature of reservoir of Carnots engine operating with an efficiency of 70% is 1000 kelvin. The temperature of its sink is
\n(a) 300 K
\n(b) 400 K
\n(c) 500 K
\n(d) 700 K<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 300 K<\/p>\n<\/details>\n

\n

The\u00a0specific heat Calculator<\/a>\u00a0is the amount of heat per unit mass required to raise the temperature by one degree Celsius.<\/p>\n

Question 8.
\nA gas is taken through a number of thermodynamic states. What happens to its specific heat?
\n(a) It is always constant.
\n(b) It increases.
\n(c) It decreases.
\n(d) It can have any value depending upon the process of heat absorbed or evolved.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) It can have any value depending upon the process of heat absorbed or evolved.<\/p>\n<\/details>\n

\n

Question 9.
\nDirections: The following question has four choices out of which ONLY ONE is correct. A refrigerator with its power on, is kept in a closed room with its door open, then the temperature of the room will _________.
\n(a) rise
\n(b) fall
\n(c) remain the same
\n(d) depend on the area of the room<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) rise<\/p>\n<\/details>\n

\n

Question 10.
\nDirections: The following question has four choices out of which ONLY ONE is correct. 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
\n(a) A and D
\n(b) B and C
\n(c) C and A
\n(d) A and B<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) A and D<\/p>\n<\/details>\n

\n

Question 11.
\nFor a diatomic gas change in internal energy for a unit change in temperature for constant pressure and constant volume is U1 and U2 respectively. What is the ratio of U1 and U2?
\n(a) 5 : 3
\n(b) 3 : 5
\n(c) 1 : 1
\n(d) 5 : 7<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 1 : 1<\/p>\n<\/details>\n

\n

Question 12.
\nAn engine has an efficiency of 1\/6. When the temperature of sink is reduced by 62\u00b0C, its efficiency is doubled. Temperature of the source is:
\n(a) 124\u00b0C
\n(b) 37\u00b0C
\n(c) 62\u00b0C
\n(d) 99\u00b0C<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) 99\u00b0C<\/p>\n<\/details>\n

\n

Question 13.
\nDirections: The following question has four choices out of which ONLY ONE is correct. 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 __________.
\n(a) 900 cal
\n(b) 625 cal
\n(c) 750 cal
\n(d) 1000 cal<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 900 cal<\/p>\n<\/details>\n

\n

Question 14.
\nAn ideal gas heat engine operates in a Carnot cycle between 227\u00b0C and 127\u00b0C. It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to:
\n(a) 1.6
\n(b) 1.2
\n(c) 4.8
\n(d) 3.5<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) 1.2<\/p>\n<\/details>\n

\n

Question 15.
\nA vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of the average rotational kinetic energy per O\u00b2 to per N\u00b2 molecule is
\n(a) 1 : 1
\n(b) 1 : 2
\n(c) 2 : 1
\n(d) depends on the moment of inertia of the two molecules<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 1 : 1<\/p>\n<\/details>\n

\n

Question 16.
\nWhich of the following statements is correct for any thermodynamic system?
\n(a) The internal energy changes in all processes.
\n(b) Internal energy and entropy are state functions.
\n(c) The change in entropy can never be zero.
\n(d) The work done in an adiabatic process is always zero.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Internal energy and entropy are state functions.<\/p>\n<\/details>\n

\n

Question 17.
\nThe temperature of reservoir of Carnots engine operating with an efficiency of 70% is 1000 kelvin. The temperature of its sink is
\n(a) 300 K
\n(b) 400 K
\n(c) 500 K
\n(d) 700 K<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 300 K<\/p>\n<\/details>\n

\n

Question 18.
\nDirections: The following question has four choices out of which ONLY ONE is correct. 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
\n(a) A and D
\n(b) B and C
\n(c) C and A
\n(d) A and B<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) A and D<\/p>\n<\/details>\n

\n

Question 19.
\nA black body at a temperature of 227\u00b0C radiates heat at the rate of 20 cal m-2s-1<\/sup>. When its temperature rises to 727\u00b0C, the heat radiated will be
\n(a) 40 units
\n(b) 160 units
\n(c) 320 units
\n(d) 640 units<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 320 units<\/p>\n<\/details>\n

\n

Question 20.
\nAt a given volume and temperature, the pressure of a gas
\n(a) varies inversely as its mass
\n(b) varies inversely as the square of its mass
\n(c) varies linearly as its mass
\n(d) is independent of its mass<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) varies linearly as its mass<\/p>\n<\/details>\n

\n

Hope the information shared regarding the NCERT MCQ Questions for Class 11 Physics Chapter 12 Thermodynamics with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 11 Physics Thermodynamics MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Students are advised to practice the\u00a0NCERT MCQ Questions for Class 11 Physics Chapter 12 Thermodynamics with Answers Pdf free download is available here. MCQ Questions for Class 11 Physics with Answers are prepared as per the Latest Exam Pattern. Students can solve these Thermodynamics Class 11 MCQs Questions with Answers and assess their preparation level. …<\/p>\n

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