Thermal Equilibrium MCQ

Test your knowledge with important Thermal Equilibrium MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Thermal Equilibrium MCQs on Bissoy. Bissoy App

• We consider a thermodynamic system. If ∆U represents the increase in its internal energy and W, the work done by the system; which of the following statements are true?
  ক

  ∆U=-W in an isothermal process

  খ

  ∆U=W in an isothermal process

  গ

  ∆U=-W in an adiabatic process

  ঘ

  ∆U=W in an adiabatic process
• Assertion: The temperature of a gas does not change, when it undergoes an adiabatic expansion. Reason: During an adiabatic process, heat energy is exchanged between a system and its surrounding.
  ক

  Both assertion and reason are true and the reason is the correct explanation of the assertion

  খ

  Both assertion and reason are true but the reason is not a correct explanation of the assertion

  গ

  Assertion is true but the reason is false

  ঘ

  Both assertion and reason are false
• Even Carnot engine cannot give 100% efficiency, because we cannot ___________
  ক

  Prevent radiation

  খ

  Find ideal sources

  গ

  Reach absolute zero temperature

  ঘ

  Eliminate friction
• Internal energy change, when a system goes from state A and B is 40 kJ mole-1. If the system goes from A and B by a reversible path and returns to state A by an irreversible path, what would be the net change in internal energy?
  ক

  40 kJ

  খ

  Greater than 40 kJ

  গ

  Later than 40 kJ

  ঘ

  Zero
• An ideal gas heat engine is operating between 227°C and 127°C. It absorbs 104 J of heat at the higher temperature. The amount of heat converted into work is?
  ক

  2000 J

  খ

  4000 J

  গ

  8000 J

  ঘ

  5600 J
• When a gas is suddenly compressed, its temperature decreases.
  ক

  True

  খ

  False
• An ideal gas is pressed at a constant temperature. Its internal energy ___________
  ক

  Decreases

  খ

  Increases

  গ

  First increases and then decreases

  ঘ

  Remains the same
• A gas does work during isothermal expansion. The source of mechanical energy so produced is the internal energy of the gas itself.
  ক

  True

  খ

  False
• Any process in which the system returns to its initial state after undergoing a series of changes is known as ___________
  ক

  Clockwise process

  খ

  Anticlockwise process

  গ

  Cyclic process

  ঘ

  Thermodynamic process
• One end of a rod is held in a fire, while the other is held by one’s hand. Just assume his hand doesn’t get burned. After some time the rod-hand system is in thermal equilibrium. True or False?
  ক

  True

  খ

  False
• The variables like pressure, volume, temperature of a thermodynamic system are microscopic. True or False?
  ক

  True

  খ

  False
• Two bodies in thermal equilibrium can have different pressures. True or False?
  ক

  True

  খ

  False