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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

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  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

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  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

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  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

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  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

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  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

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  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

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  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

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  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

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  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

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