Class XI Physics Revision Tests – Thermodynamics



Max marks 35

Time 1 ½ hrs

Questions 1 to 5: 1 mark  each

Questions 6 to 10: 2 marks each

Questions 11 to 15: 3 marks each

Question 16: 5 marks

  1. What is an isochoric process?
  2. On what factors does the efficiency of a Carnot engine depend?
  3. State second law of thermodynamics. (Any one statement)
  4. State zeroth law of thermodynamics.
  5. What is a heat engine?
  6. State first law of thermodynamics and apply it to an isothermal process.
  7. Explain why a balloon is cooler after it bursts.
  8. What is a PV diagram? What does the area between the PV curve and the volume axis signify?
  9. State the conditions for two bodies to be in thermal equilibrium.
  10. State Carnot’s theorem and explain its significance.
  11. What is a cyclic process? Show that the work done in a cyclic process is equal to the area enclosed by the loop representing the cyclic process.
  12. Why gases have two principal specific heat capacities? Define them
  13. Why C > Cv? Prove that C – Cv = R
  14. Define the coefficient of performance of a heat pump. (refrigerator) and obtain a relation for it in terms of temperature T1 and T2
  15. A sample of gas (γ = 1.5) is compressed adiabatically from a volume of 1600 cm3 to 400 cm3.  If the initial pressure is 150 kPa, what is the final pressure and how much work is done on the gas in the process?
  16. Explain the construction and various operations involved in a Carnot’s heat engine with neat labeled diagram. Draw Carnot’s cycle and write expression for efficiency of a Carnot’s heat engine.


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Optional Proficiency Test for Class-X

CBSE is conducting an optional proficiency test in all the five main subjects from next year.

The proposed Proficiency Test is being conducted with the broad objectives of :

  • acting as a benchmark in testing of skills and higher mental abilities of students
  • providing motivation to students for academic excellence in the respective subject
  • providing feedback to students and parents on how well the students have achieved the desired learning objectives.
  • providing feedback to schools on levels of learning of their students and setting
  • goals, priorities and targets in their future educational plan.


Some of the specific read more

Numericals from Kinematics


  1. A particle is projected at 60º to the horizontal with a kinetic energy K. What is the kinetic energy at the highest point
  2. Which of the following statements is false for a particle moving in a circle with a constant angular speed?
    (a) the velocity vector is tangent to the circle
    (b) the acceleration vector is tangent to the circle
    (c) the acceleration vector points to the centre of the circle
    (d) the velocity and acceleration vectors are perpendicular to each other
  3. A car is moving in a circular horizontal track of radius 10.0 m with a constant speed of 10.0m/s.A plumb bomb is suspended from the roof of the car by a light rigid rod of length1.00m. What is the angle made by the rod with the track is (g= 10 m/s²)
  4. The distance traveled by an object along the axes are given by x=2t², y = t² – 4, z = 3 t – 5. What is the initial velocity of the particle
  5. A boy playing o the roof of 10m high building throws a ball with a speed of 10 m/s at an angle of 30º the horizontal. How far from the throwing point will the ball be at the height of 10m from the ground?
  6. If a body travels half of its path in the last second of its fall from rest; find the time and height of its fall?
  7. An object A is kept fixed at the point x = 3m and y=1.25m on a moving along the +x direction with an acceleration 1.5 m/s. At the same instant a stone hitting the object during its downward motion at an angle pf 45º to the horizontal .all the motions are in X-Y plane .Find u and time after which stone hits the object. Take g = 10m/s²
  8. Three particles a, b and c are situated at the vertices of an equilateral triangle ABC of side d at t=0. Each of the particles moves with constant speed v. A always has its velocity along BC and C along CA. At what time will the particles meet each other?
  9. A man standing on road has to hold his umbrella at 30º with the vertical to keep the rain away he throws the umbrella and starts running at 10 km/h. he finds that  raindrops with respect to [a]the road, [b] the moving man.

10. A man can swim at speed of 3 km/h in still water. He wants to cross a 500 m wide river flowing at 2 km/h. he keeps himself always at an angle of 120º with the read more