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Chemical Engineering :: Stoichiometry

  1. 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

  2. A.

     Independent of temperature

    B.

     Increases with rise in pressure

    C.

     Increased with decrease in pressure

    D.

     Unchanged with pressure changes


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

  4. A.

     Independent of the temperature

    B.

     Increased with the increase in pressure

    C.

     Decreased with the increase in pressure

    D.

     Unchanged by the pressure change


  5. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?

  6. A.

     AB₃

    B.

     A₂B₃

    C.

     A₂B

    D.

     AB₂


  7. Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.

  8. A.

     Compressibility

    B.

     Molecular weight

    C.

     Humidity

    D.

     None of these


  9. If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is __________ times.

  10. A.

     10

    B.

     100

    C.

     1000

    D.

     10000


  11. The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements. This is the statement of

  12. A.

     Law of Petit and Dulong

    B.

     Kopp's rule

    C.

     Nearnst heat theorem

    D.

     Trouton's rule


  13. In the reaction, represented by Na₂CO₃ + HC₁ → NaHO₃ + NaCl, the equivalent weight of Na₂CO₃ is

  14. A.

     53

    B.

     5.3

    C.

     106

    D.

     10.6


  15. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The amount of water vapour condensed (in kg) is

  16. A.

     0.0

    B.

     0.065

    C.

     0.1

    D.

     1.0


  17. Gases having same reduced temperatures and reduced pressures

  18. A.

     Deviate from ideal gas behaviour to the same degree

    B.

     Have nearly the same compressibility factor

    C.

     Both A & B

    D.

     Neither A nor B


  19. Real gases approach ideal behaviour at

  20. A.

     High pressure & high temperature

    B.

     Low pressure & high temperature

    C.

     High pressure & low temperature

    D.

     Low pressure & low temperature