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Chemical Engineering :: Stoichiometry

  1. For the gaseous phase reaction, N2 + O22NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by

  2. A.
    increasing the concentration of N2.
    B.
    decrease in temperature.
    C.
    increase in pressure.
    D.
    decrease in pressure.

  3. Pick out the correct statement.

  4. A.
    Heat of solution is always positive.
    B.
    At equilibrium, ΔG is zero.
    C.
    For the reaction, PCl5PCl3 + Cl2, ΔG is less than ΔE
    D.
    The heating of water in a beaker is an example of an isolated system.

  5. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is

  6. A.
    independent of temperature.
    B.
    increases with rise in pressure.
    C.
    increased with decrease in pressure.
    D.
    unchanged with pressure changes.

  7. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is

  8. A.
    1.72
    B.
    0.58
    C.
    0.5
    D.
    0.2

  9. Pick out the correct statement.

  10. A.
    A substance existing above its critical temperature is called a saturated vapor.
    B.
    A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature.
    C.
    Heat added to or given up by a substance at constant temperature is called the sensible heat.
    D.
    The end points of a vapor-pressure vs. temperature curve are critical and triple points.

  11. Normality of a solution does not change with the increase in the

  12. A.
    pressure
    B.
    temperature
    C.
    solute concentration
    D.
    dilution of the solution