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Chemical Engineering :: Chemical Engineering Thermodynamics

  1. Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂.Degree of dissociation of PCl5 will

  2. A.

     Decrease on addition of Cl₂

    B.

     Increase on addition of an inert gas at constant pressure

    C.

     Decrease on increasing the pressure of the system

    D.

     None of these


  3. A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are

  4. A.

     4

    B.

     3

    C.

     5

    D.

     6


  5. The compressibility factor of a gas is given by (where, V₁ = actual volume of the gas V₂ = gas volume predicted by ideal gas law )

  6. A.

     V₁/V₂

    B.

     V₂/V₁

    C.

     V₁-V₂

    D.

     V₁.V₂


  7. Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is

  8. A.

     300(32/7)

    B.

     300(33/5)

    C.

     300(33/7)

    D.

     300(35/7)


  9. As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches

  10. A.

     Zero

    B.

     Unity

    C.

     Infinity

    D.

     None of these


  11. Refrigeration capacity of a household refrigerator may be round about __________ tons.

  12. A.

     0.15

    B.

     1.5

    C.

     4.5

    D.

     6.5


  13. All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

  14. A.

     CO₂

    B.

     H₂

    C.

     O₂

    D.

     N₂


  15. On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

  16. A.

     Increase

    B.

     Decrease

    C.

     Remain same

    D.

     Increase in summer and will decrease in winter


  17. The value of gas constant 'R' is

  18. A.

     1.987 cal/gm mole °K

    B.

     1.987 BTU/lb. mole °R

    C.

     Both A and B

    D.

     Neither A nor B


  19. With increase in pressure (above atmospheric pressure), the Cp of a gas

  20. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     First decreases and then increases