CHAPTER-12: THERMODYNAMICS

 

1. The zeroth law of thermodynamics leads to the concept of

  • Internal energy
  • Heat content
  • Pressure
  • Temperature

2. Internal energy of an isolated system

  • Increases
  • Decreases
  • Remains the same
  • None of these

View Answer

Remains the same

3. First Law of Thermodynamics leads to –

  • Conservation of mass
  • Conservation of linear momentum
  • Conservation of energy
  • Conservation of angular momentum.

View Answer

Conservation of energy

4. First law of thermodynamics is the law of Conservation of –

  • Mass
  • Linear momentum
  • Energy
  • Angular momentum

5. Which of the following is conserved in the first law of thermodynamics?

  • Number of molecules
  • Energy
  • Temperature
  • Heat.

6. In the isochoric process

  • Pressure = Constant
  • Volume = Constant
  • Temperature = Constant
  • Pressure and Volume both constant

View Answer

Volume = Constant

7. In the isothermal process –

  • Temperature increases
  • Temperature decreases
  • Temperature neither increases nor decreases
  • Volume remains the same

View Answer

Temperature neither increases nor decreases

8. In a cyclic process, the internal energy of the gas –

  • increases
  • decreases
  • remains constant
  • becomes zero.

View Answer

remains constant

9. In an isobaric process –

View Answer

Pressure neither increases or decreases (P fixed)

10. Find the efficiency of a Carnot’s engine working between 127°C and 27°C?

11. An adiabatic process occurs at constant –

12. The efficiency of a Carnot engine depends on the temperature of –

13. A refrigerator is –

View Answer

a heat engine working back