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Chemical Engineering :: Stoichiometry

  1. Except for monoatomic gases, the molal heat capacity at constant volume for all gases is __________ Kcal/Kg mole.° K.

  2. A.

     3

    B.

     > 3

    C.

     < 3

    D.

     < 1


  3. Addition of a non-volatile solute to a solvent produces a __________ in its solvent.

  4. A.

     Freezing point elevation

    B.

     Boiling point depression

    C.

     Vapor pressure lowering

    D.

     All of the above


  5. The temperature at which a real gas obeys Boyle's law is termed as the

  6. A.

     Triple point

    B.

     Boyle's temperature

    C.

     Eutectic point

    D.

     Inversion temperature


  7. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.

  8. A.

     Saturated

    B.

     Superheated

    C.

     Unsaturated

    D.

     Dry gaseous


  9. The osmotic pressure of a solution is directly proportional to the

  10. A.

     Lowering of vapor pressure

    B.

     Molecular concentration of the solute

    C.

     Absolute temperature of a given concentration

    D.

     All of the above


  11. At a temperature of 0°K, the molecules of a gas have only __________ energy.

  12. A.

     Rotational

    B.

     Vibrational

    C.

     Translational

    D.

     None of these


  13. Raoult's law is not applicable to the

  14. A.

     Solutes which dissociate or associate in the particular solution

    B.

     Concentrated solutions

    C.

     Both B & C

    D.

     Solutions containing non-volatile solute


  15. Which of the following is not a colligative property?

  16. A.

     Osmotic pressure

    B.

     Depression of freezing point

    C.

     Lowering of vapor pressure

    D.

     None of these


  17. The value of Trouton's ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids.

  18. A.

     Polar

    B.

     Non-polar

    C.

     Both A & B

    D.

     Neither A nor B


  19. The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes. This is the __________ law.

  20. A.

     Dalton's

    B.

     Amgat's

    C.

     GayLussac's

    D.

     Avogadro's