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Chemical Engineering :: Stoichiometry

  1. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent ?

  2. A.
    Temperature
    B.
    Nature of solute
    C.
    Pressure
    D.
    Nature of solvent

  3. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its

  4. A.
    bubble point.
    B.
    saturation temperature.
    C.
    dew point.
    D.
    both (b) and (c).

  5. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.

  6. A.
    varies linearly
    B.
    increases
    C.
    decreases
    D.
    does not vary

  7. Pick out the wrong unit conversion.

  8. A.
    l kgf= 9.8 Newton.
    B.
    1 stoke = 1 m2/second.
    C.
    1 Pascal second = 10 poise.
    D.
    1 ppm = 1 ml/m3 = 1 mg/kg.

  9. Disappearance of snow in subzero weather exemplifies the process of

  10. A.
    evaporation
    B.
    sublimation
    C.
    vaporisation
    D.
    melting

  11. A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2 ; then the partial pressure of N2 in the mixture will be __________ kgf/cm2 .

  12. A.
    1
    B.
    2
    C.
    4
    D.
    8

  13. How much O2 can be obtained from 90 kg of water ?

  14. A.
    32 kg
    B.
    80 kg
    C.
    64 kg
    D.
    90 kg

  15. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is

  16. A.
    less than 100°C
    B.
    100°C
    C.
    between 100 and 110°C
    D.
    110.6°C

  17. A solution of specific gravity 1 consists of 35% A by weight and the remaining B. If the specific gravity of A is 0.7, the specific gravity of Bis

  18. A.
    1.25
    B.
    1.3
    C.
    1.35
    D.
    1.2

  19. Pick out the wrong unit conversion.

  20. A.
    1 Joule = 4.186 calorie.
    B.
    1 kcal = 3.968 BTU = 0.00116 kWh = 0.00156 hp.
    C.
    1 ton of TNT (tri-nitro-toluene) = 4.2 GJ (1G = 109).
    D.
    1 ft.lbf= 0.3238 calorie = 0.1383 kg.m = 1.356 J = 1.356 N.m.