NCERT Class 11 Physics MCQ Chapter 11 Thermodynamics Solutions, AHSEC Class 11 Physics Multiple Choice Question Answer to each chapter is provided in the list so that you can easily browse throughout different chapters NCERT Class 11 Physics MCQ Chapter 11 Thermodynamics Question Answer and select needs one.
Class 11 Physics MCQ Chapter 11 Thermodynamics
Also, you can read the SCERT book online in these sections NCERT Class 11 Physics Multiple Choice Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. AHSEC Class 11 Physics MCQ Solutions. These solutions are part of SCERT All Subject Solutions. Here we have given HS 1st Year Physics Objective Type Question Answer for All Subjects, You can practice these here.
Thermodynamics
Chapter: 11
| PART – ⅠⅠ |
MULTIPLE CHOICE QUESTION ANSWER
1. Which of the following variables is a thermodynamic state variable:
(i) Work.
(ii) Heat.
(iii) Internal energy.
(iv) None of these.
Ans: (iii) Internal energy.
2. What is the main subject of study in thermodynamics?
(i) Mechanics.
(ii) Thermodynamic processes.
(iii) Internal energy and work.
(iv) Energy transformations between heat and other forms.
Ans: (iv) Energy transformations between heat and other forms.
3. How much heat is required to raise the temperature of 2.0 × 10⁻² kg of nitrogen by 45°C? (Molecular mass of N₂ = 28, R = 8.3 J/mol·K)
(i) 93.5 J.
(ii) 120 J.
(iii) 15 J.
(iv) 50 J.
Ans: (i) 93.5 J.
4. When steam is converted into water, internal energy of the system:
(i) Increases.
(ii) Decreases.
(iii) Remains constant.
(iv) No response.
Ans: (ii) Decreases.
5. If a gas is compressed to half its original volume, by what factor does its pressure increase? (γ = 1.4 for hydrogen):
(i) 1.5
(ii) 2.639
(iii) 4.0
(iv) 5.6
Ans: (ii) 2.639.
6. Which scientist is associated with the development of the Zeroth Law of Thermodynamics?
(i) James Clerk Maxwell.
(ii) Rudolf Clausius.
(iii) R.H. Fowler.
(iv) Isaac Newton.
Ans: (iii) R.H. Fowler.
7. Which of the following phenomena is reversible?
(i) Waterfall.
(ii) Charging of a battery.
(iii) Rusting of iron by chemical change.
(iv) Production of heat by rubbing your hands.
Ans: (ii) Charging of a battery.
8. When a gas expands freely into a vacuum (free expansion), how does the pressure change?
(i) The pressure remains constant.
(ii) The pressure increases.
(iii) The pressure decreases.
(iv) The pressure fluctuates.
Ans: (i) The pressure remains constant.
9. The internal energy of an ideal gas depends upon:
(i) Only its pressure.
(ii) Only its volume.
(iii) Only its temperature.
(iv) All its pressure, volume and temperature.
Ans: (iii) Only its temperature.
10. What is the change in internal energy of the gas during the expansion when the stopcock is opened between two cylinders, A and B, and the system is thermally insulated?
(i) Positive.
(ii) Negative.
(iii) Zero.
(iv) Cannot be determined.
Ans: (iii) Zero.
11. If 1 cal is equal to 4.19 J, how much heat is absorbed in joules when 9.35 cal of heat is added to the system?
(i) 39.15 J
(ii) 15.69 J
(iii) 45.3 J
(iv) 5.0 J
Ans: (i) 39.15 J
12. At a given volume and temperature, the pressure of a gas:
(i) Varies inversely as its mass.
(ii) Varies inversely as the square of its mass.
(iii) Varies linearly as its mass.
(iv) Is independent of its mass.
Ans: (iii) Varies linearly as its mass.
13. The translational kinetic energy of gas molecules at temperature T for one mole of a gas is:
(i) (3/2) RT.
(ii) (9/2) RT.
(iii) (1/3) RT.
(iv) (5/2) RT.
Ans: (i) (3/2) RT.
14. What thermodynamic variable is equal for two systems in thermal equilibrium with each other?
(i) Pressure.
(ii) Volume.
(iii) Temperature.
(iv) Internal energy.
Ans: (iii) Temperature.
15. Which of the following parameters does not characterise the thermodynamic state of matter?
(i) Work.
(ii) Volume.
(iii) Pressure.
(iv) Temperature.
Ans: (i) Work.
