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Chemical Engineering :: Stoichiometry

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

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

  3. Pick out the wrong unit conversion.

  4. 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.

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

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

  7. 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 .

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

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

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

  11. 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

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

  13. 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

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

  15. Pick out the wrong unit conversion.

  16. 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.

  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. The depression in freezing point of a solution is

  20. A.
    inversely proportional to the mass of solvent.
    B.
    directly proportional to the mole of solute.
    C.
    both (a) and (b).
    D.
    neither (a) nor (b).