Home / Chemical Engineering / Stoichiometry :: Section 7

Chemical Engineering :: Stoichiometry

  1. 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

  2. A.
    0.0
    B.
    0.065
    C.
    0.1
    D.
    1.0

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing ) ?

  4. A.
    ΔH = 1 (+ ve)and Δ V = -ve
    B.
    ΔH = 0
    C.
    ΔV = 0
    D.
    both (b) and (c)

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Which equation is not an equation of state ?

  6. A.
    PV = RT + B/V + y/V2 + ....
    B.
    (P + a/V2)(V-b) = RT
    C.
    D.

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Number of gm moles of solute dissolved in 1 kg of solvent is called its

  8. A.
    normality
    B.
    molarity
    C.
    molality
    D.
    formality

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Size range of the colloidals particles is

  10. A.
    5 - 200 milli-microns
    B.
    50 - 200 microns
    C.
    500 - 1000 microns
    D.
    10 - 50 Angstrom

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. The latent heat of vaporisation

  12. A.
    decreases with increased temperature.
    B.
    decreases as pressure increases
    C.
    becomes zero at the critical point.
    D.
    all (a), (b) & (c).

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is

  14. A.
    80.1°C.
    B.
    less than 80.1°C.
    C.
    100°C.
    D.
    greater than 80.1°C but less than 100°C.

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Pick out the wrong unit conversion of heat transfer co-efficient.

  16. A.
    1 kcal/m2.hr.°C = 0.2048 BTU/ft2.hr. °F. = 1.163 W/m2.°K
    B.
    1 kcal/m2.hr.°K = 1.163 W/m2.°C
    C.
    1 W/m2 . °C = 0.1761 BTU/ft2.hr.°F.
    D.
    1 BTU/ft2.hr.°F = 4.88 kcal/m2.hr.°C = 20.44 kJ/m2.hr°C = 5.678 W/m2.°C.

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. The value of gas constant 'R' is __________ kcal/kg.mole.°C.

  18. A.
    2.79
    B.
    1.987
    C.
    3.99
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume 'X' diffuses twice as fast as another perfume 'Y'; what is the molecular weight of 'Y', if the vapor density of gas 'X' is 2 ? Molecular weight of gas 'X' is to be assumed to be 2.

  20. A.
    2
    B.
    4
    C.
    8
    D.
    16

    View Answer

    Workspace

    Discuss Discuss in Forum