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Chemical Engineering :: Stoichiometry

  1. The temperature at which the second Virial co-efficient of a real gas is zero is called the

  2. A.

     Eutectic point

    B.

     Boyle temperature

    C.

     Boiling point

    D.

     Critical temperature


  3. The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.

  4. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Either A or B; depends on the liquid


  5. The depression in freezing point of a solution is

  6. A.

     Inversely proportional to the mass of solvent

    B.

     Directly proportional to the mole of solute

    C.

     Both A & B

    D.

     Neither A nor B


  7. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is

  8. A.

     180

    B.

     60.3

    C.

     720

    D.

     200


  9. Saturated molal absolute humidity of the vapor-gas mixture depends upon the

  10. A.

     Vapor pressure at dry bulb temperature

    B.

     Total pressure

    C.

     Both A & B

    D.

     Neither A nor B


  11. 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H₂ produced will be __________ gm. gm.

  12. A.

     0.5

    B.

     1

    C.

     3

    D.

     5


  13. One micron is equal to __________ cm.

  14. A.

     10-2

    B.

     10-4

    C.

     10-6

    D.

     10-8


  15. Pick out the wrong unit conversion of thermal conductivity.

  16. A.

     1 BTU/ft².hr.°F/ft = 1.488 kcal/m². hr.°C/m

    B.

     1 BTU/ft².hr.°F/inch = 1.488 kcal/m². hr.°C/m

    C.

     1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K

    D.

     1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F


  17. Kopp's rule is helpful in finding the

  18. A.

     Heat capacities of solids

    B.

     Heat capacities of gases

    C.

     Molal heat capacities of gases

    D.

     Activation energy


  19. Hess's law of constant heat summation is based on conservation of mass. It deals with

  20. A.

     Equilibrium constant

    B.

     Reaction rate

    C.

     Changes in heat of reaction

    D.

     None of these