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Home Chemical Engineering Stoichiometry Comments

  • Question
  • Pick out the wrong statement.


  • Options
  • A. Ten times dilution of a normal solution (N) reduces its normality to N/10.
  • B. When equal weights of oxygen and methane are mixed in an empty reactor at room temperature, then the fraction of total pressure exerted by the oxygen is 1/2.
  • C. Volume occupied by 9.034 x 1023 atoms of oxygen in ozone (O3) at NTP will be 11200 c.c
  • D. One kg mole of an ideal gas at N.T.P occupies 22400 Nm3.

  • Correct Answer
  • One kg mole of an ideal gas at N.T.P occupies 22400 Nm3


  • Stoichiometry problems


    Search Results


    • 1. The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.

    • Options
    • A. lower than
    • B. higher than
    • C. same as
    • D. not related to
    • Discuss
    • 2. One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as

    • Options
    • A. Brix = (400/G) - 400
    • B. Brix = 200 (G-1)
    • C. Brix = 145 - (145/G)
    • D. none of these
    • Discuss
    • 3. If 1.5 moles of oxygen combines with aluminium to form Al2O3, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.

    • Options
    • A. 27
    • B. 54
    • C. 5.4
    • D. 2.7
    • Discuss
    • 4. 'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

    • Options
    • A. temperature vs. log (vapor pressure).
    • B. vapor pressure vs. log (temperature).
    • C. log (temperature) vs. log (vapor pressure).
    • D. vapor pressure vs. temperature.
    • Discuss
    • 5. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.

    • Options
    • A. saturated
    • B. supersaturated
    • C. superheated
    • D. none of these
    • Discuss
    • 6. The density of a gas at N.T.P.is '?'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become at a temperature of __________ °K

    • Options
    • A. 273°
    • B. 300°
    • C. 400°
    • D. 300°
    • Discuss
    • 7. Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

    • Options
    • A. sizes of the component molecules are approximately equal.
    • B. attractive forces between like and unlike molecules are approximately equal.
    • C. component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution.
    • D. all (a), (b) & (c).
    • Discuss
    • 8. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal

    • Options
    • A. kinetic energy.
    • B. intermolecular forces of attraction.
    • C. potential energy.
    • D. total energy.
    • Discuss
    • 9. Pick out the correct conversion.

    • Options
    • A. 1 BTU =453.6 calories
    • B. 1 BTU = 252 calories
    • C. 1 calorie = 252 BTU
    • D. 1 calorie = 453.6 BTU
    • Discuss
    • 10. The osmotic pressure of a solution is directly proportional to the

    • Options
    • A. lowering of vapor pressure.
    • B. molecular concentration of the solute.
    • C. absolute temperature of a given concentration.
    • D. all (a), (b) and (c).
    • Discuss


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