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Chemical Engineering :: Stoichiometry

  1. Elements in a periodic table are arranged in order of their

  2. A.

     Atomic number

    B.

     Mass number

    C.

     Atomic weight

    D.

     Metallic characteristics


  3. For an ideal gas, the compressibility factor

  4. A.

     Decreases with pressure rise

    B.

     Is unity at all temperature

    C.

     Is unity at Boyle's temperature

    D.

     Zero


  5. The effect of pressure on the heat capacity of the gases __________ is negligible.

  6. A.

     At pressure below one atmosphere

    B.

     Below the critical temperature

    C.

     Both A & B

    D.

     Neither A nor B


  7. Gases diffuse faster compared to liquids because of the reason that the liquid molecules

  8. A.

     Are held together by stronger inter-molecular forces

    B.

     Move faster

    C.

     Have no definite shape

    D.

     Are heavier


  9. The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is

  10. A.

     Termed as relative saturation

    B.

     Not a function of the composition of gas mixture

    C.

     Called percentage saturation

    D.

     Not a function of the nature of vapor


  11. The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the

  12. A.

     Nature of both the gas & the liquid

    B.

     Temperature

    C.

     Total pressure

    D.

     None of these


  13. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the

  14. A.

     Nature of the liquid

    B.

     Nature of the gas

    C.

     Temperature of the liquid

    D.

     Total pressure


  15. The heat capacity of most substances is greater for the __________ state.

  16. A.

     Solid

    B.

     Liquid

    C.

     Gaseous

    D.

     None of these


  17. Addition of a non-volatile solute to a pure solvent

  18. A.

     Increases its freezing point

    B.

     Increases its boiling point

    C.

     Decreases its freezing point

    D.

     Both B and C


  19. In the reaction, Ca + 2H₂O = Ca(OH)₂ + H₂ ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water?
    (atomic weight of calcium = 40)

  20. A.

     4480

    B.

     2240

    C.

     1120

    D.

     0.4