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Federal (FBISE) · Chapter test · Free

1st Year Physics Chapter 8 Test08. Heat and Thermodynamics

30 marks · 40 minutes · 21 questions. Covers: 08. Heat and Thermodynamics.

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1st Year Physics Chapter 8 Test

1st Year · Physics · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Ideal gas molecules exert force on each other only during:
    1. Free expansion
    2. Collision
    3. Heating
    4. Cooling
  2. Maximum work is obtained by the process called:
    1. Isochoric
    2. Isothermal
    3. Isobaric
    4. Adiabatic
  3. The average kinetic energy of gas molecules depends on temperature only.
    1. Pressure
    2. Volume
    3. Density
    4. Temperature
  4. Charles's law graph between volume and temperature is
    1. Curved
    2. Parabolic
    3. Straight line
    4. Zig-zag
  5. The equation PV = NkT relates pressure, volume, and temperature with:
    1. Boltzmann constant
    2. Avogadro's number
    3. Molar mass
    4. Molecular size
  6. According to first law of thermodynamics, when heat is added to the system,
    1. Internal energy decreases
    2. Work must be zero
    3. Internal energy increases
    4. No energy change occurs
  7. Hot reservoir temperature is
    1. Lower than cold reservoir
    2. Equal to cold reservoir
    3. Not related to cold reservoir
    4. Higher than cold reservoir
  8. Which equation represents the ideal gas equation?
    1. PV = mRT
    2. PV = nRT
    3. P = ρRT
    4. PV = KT
  9. Boyle's law states that volume of a given mass of gas at constant temperature is inversely proportional to
    1. Pressure
    2. Temperature
    3. Heat
    4. Density
  10. Boyle's law states that for a fixed mass of gas at constant temperature, the product of pressure and volume remains
    1. Minimum
    2. Zero
    3. Maximum
    4. Constant

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. What is meant by ideal gas equation?
  2. Why is Carnot engine considered an ideal engine?
  3. What does temperature measure according to kinetic theory?
  4. State the direction of natural heat flow.
  5. Give an example of a process in which no heat is transferred to or from the system but the temperature of the system changes.
  6. Define internal energy of a system.
  7. What is meant by a hot reservoir?
  8. Why must the hot reservoir be at a higher temperature?

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Discuss the sign convention for entropy and explain the entropy changes of source and sink when heat flows between two reservoirs.
  2. Describe thermal equilibrium and explain it with the help of a diagram.
  3. Explain the second law of thermodynamics in detail and describe both Kelvin's and Clausius's statements with examples.