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  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

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  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

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  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

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  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)

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  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

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  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

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  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

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  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

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  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

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  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

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