Internal energy is equal to the heat absorbed in case of a/an ______________ process?

Related Mcqs:

1. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

   A. 100,000 kW
   B. 160,000 kW
   C. 200,000 kW
   D. 320,000 kW

2. Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of______________?

   A. Fusion
   B. Vaporisation
   C. Transition
   D. None of these

3. Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?

   A. Vapor to liquid
   B. Vapor to solid
   C. Solid to liquid
   D. One allotropic form to another allotropic form

4. For an isothermal process, the internal energy of a gas____________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Data insufficient, can’t be predicted

5. Internal energy change of a system over one complete cycle in a cyclic process is__________________?

   A. Zero
   B. +ve
   C. -ve
   D. Dependent on the path

6. For a constant volume process _____________ by the system is used only to increase the internal energy?

   A. Heat absorbed
   B. Work done
   C. Both A. & B
   D. Neither A. nor B

7. The internal energy of an ideal gas does not change in a reversible _____________ process?

   A. Isothermal
   B. Adiabatic
   C. Isobaric
   D. Isometric

8. When a gas in a vessel expands, its internal energy decreases. The process involved is________________?

   A. Reversible
   B. Irreversible
   C. Isothermal
   D. Adiabatic

9. “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

   A. Law of Petit and Dulong
   B. Kopp’s rule
   C. Nernst heat theorem
   D. Trouton’s rule

10. In an ideal refrigeration cycle, the change in internal energy of the fluid is_____________?

    A. +ve
    B. -ve
    C. 0
    D. Either of the above three; depends on the nature of refrigerant