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Chemical Engineering :: Stoichiometry

  1. Boiling point of a solution as compared to that of the corresponding solvent is

  2. A.

     Less

    B.

     More

    C.

     Same

    D.

     Either more or less; depends upon the solvent


  3. Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?
    Vapour pressure of water at 20°C is 17.5 mm Hg.

  4. A.

     80.38

    B.

     80

    C.

     79.62

    D.

     78.51


  5. Validity of the relationship, inputs = outputs, holds good for the system at steady state

  6. A.

     With chemical reaction

    B.

     Without chemical reaction

    C.

     Without chemical reaction & losses

    D.

     None of these


  7. The crystallisation of a solute from a solution may be done by

  8. A.

     Removal of pure solvent by evaporation

    B.

     Change of temperature thereby causing supersaturation

    C.

     Changing the nature of the system by the addition of a more soluble material

    D.

     All of the above


  9. 'Giga' stands for

  10. A.

     109

    B.

     10-12

    C.

     1012

    D.

     1015


  11. The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.

  12. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Increases linearly


  13. __________ chart is a graph related to Antonie equation.

  14. A.

     Ostwald

    B.

     Cox

    C.

     Mollier's

    D.

     Enthalpy-concentration


  15. Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.

  16. A.

     Carbonate (monohydrate)

    B.

     Chloride

    C.

     Thiosulphate

    D.

     Bisulphite


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

  18. A.

     Pressure

    B.

     Temperature

    C.

     Solute concentration

    D.

     Dilution of the solution


  19. The elevation in boiling point of a solution is proportional to the __________ of the solution.

  20. A.

     Molal concentration

    B.

     Reciprocal of the molal concentration

    C.

     Normality

    D.

     Molarity