Home / Chemical Engineering / Stoichiometry :: Section 5

Chemical Engineering :: Stoichiometry

  1. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

  2. A.
    collide without loss of energy.
    B.
    do work equal to loss in kinetic energy.
    C.
    are above the inversion temperature.
    D.
    exert no attractive force on each other.

  3. With increase in the solute concentration, the specific heat of aqueous solutions

  4. A.
    increases
    B.
    decreases
    C.
    remains unchanged
    D.
    either (a) or (b); depends on the type of solution

  5. The heat capacity of a substance is

  6. A.
    greater for liquid state than for solid state.
    B.
    lower for liquid state than for gaseous state.
    C.
    higher for solid state than for liquid state.
    D.
    equal for solid and liquid states below melting point.

  7. The heat of solution depends upon the

  8. A.
    nature of solvent
    B.
    concentration of solution
    C.
    nature of solute
    D.
    all (a), (b) & (c)

  9. The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be

  10. A.
    10%
    B.
    5%
    C.
    18.18%
    D.
    20%

  11. 80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is

  12. A.
    0.00
    B.
    0.18
    C.
    0.24
    D.
    1.00

  13. Atmospheric pressure corresponds to a hydrostatic head of

  14. A.
    13.6 cms of Hg
    B.
    34 ft ofH2O
    C.
    1 metre of H2O
    D.
    13.6 metres of Hg

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

  16. A.
    rotational
    B.
    vibrational
    C.
    translational
    D.
    none of these

  17. A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be

  18. A.
    3 kmole/hr
    B.
    4 kmole/hr
    C.
    5 kmole/hr
    D.
    6 kmole/hr

  19. "The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface". This statement pertaining to the solubility of gases in liquid is the __________ law.

  20. A.
    Raoult's
    B.
    Henry's
    C.
    Amgat's
    D.
    none of these