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Chemical Engineering :: Stoichiometry

  1. __________ fuels require the maximum percentage of 'excess air' for complete combustion.

  2. A.
    Solid
    B.
    Liquid
    C.
    Gaseous
    D.
    Nuclear

  3. Pick out the wrong statement:

  4. A.
    Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve.
    B.
    At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite.
    C.
    Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture.
    D.
    Clapeyron equation is given by,; where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG and VL = volumes of gas and liquid respectively.

  5. __________ equation relates latent heat and boiling point.

  6. A.
    Antonie
    B.
    Kistyakowsky
    C.
    Kopp's
    D.
    Trouton's

  7. At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.

  8. A.
    increases
    B.
    decreases
    C.
    remains unchanged
    D.
    increases linearly

  9. The heat evolved in the combustion of benzene is represented by the equation:
        C6H6 + 7.5 O2 = 6CO2 + 3H2O, ΔH = 3264.6 kJ/kg. mole
    The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be __________ kJ/kgmole.

  10. A.
    +816.15
    B.
    +1632.3
    C.
    -1632.3
    D.
    -2448.45

  11. Pick out the wrong statement about the recycle stream in a process.

  12. A.
    Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants.
    B.
    The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio.
    C.
    Recycling in a process does not help in getting higher extent of reaction.
    D.
    Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column.

  13. An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is

  14. A.
    0.2500
    B.
    0.2528
    C.
    0.5000
    D.
    0.5055

  15. Which of the following ideal gas laws are not applicable to mixture of gases ?

  16. A.
    Amgat's law
    B.
    Dalton's law
    C.
    Boyle's law & Charle's Law
    D.
    none of these

  17. Cv for monoatomic gases is equal to(where, R = gas constant)

  18. A.
    R
    B.
    1.5 R
    C.
    2R
    D.
    3R

  19. Unit of power is

  20. A.
    joule
    B.
    watt
    C.
    joule/Second
    D.
    both(b)&(c)