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Chemical Engineering :: Stoichiometry

  1. In physical adsorption, as compared to chemisorption, the

  2. A.
    quantity adsorbed per unit mass is higher.
    B.
    rate of adsorption is controlled by the resistance to surface reaction.
    C.
    activation energy is very high.
    D.
    heat of adsorption is very large.

  3. The combustion equations of carbon and carbon monoxide are as follows:
    C + O2 = CO2, ΔH = - 394 kJ/kg . mole CO + 1/2 O2 = CO2, ΔH = - 284.5 kJ/kg. mole.
    The heat of formation of CO is __________ kJ/kg. mole.

  4. A.
    -109.5
    B.
    +109.5
    C.
    +180
    D.
    +100

  5. Dissolving a solute in a solvent does not change its

  6. A.
    specific heat
    B.
    vapour pressure
    C.
    viscosity
    D.
    none of these

  7. A reduction process is accompanied with increase in the

  8. A.
    number of electrons
    B.
    oxidation number
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

  9. The reaction A + B → C has been conducted in a reactor as shown below.

    The number of boundaries around which material balance can be written, are

  10. A.
    1
    B.
    6
    C.
    3
    D.
    4

  11. Heat of transition is the heat evolved or absorbed, when a substance is converted from

  12. A.
    vapor to liquid.
    B.
    vapor to solid.
    C.
    solid to liquid.
    D.
    one allotropic form to another allotropic form.

  13. 1 BTU/lb.°F is equivalent to __________ kcal/kg.°C.

  14. A.
    1
    B.
    2.42
    C.
    1.987
    D.
    4.97

  15. The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation

  16. A.
    increases with pressure rise.
    B.
    decreases with increasing pressure.
    C.
    becomes zero at the critical point.
    D.
    both (b) & (c).

  17. Which of the following gravity scales is used exclusively for liquids heavier than water ?

  18. A.
    Baumme scale
    B.
    Twaddel scale
    C.
    API scale
    D.
    none of these

  19. For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.

  20. A.
    integral
    B.
    differential
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)