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Chemical Engineering :: Stoichiometry

  1. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively ?

  2. A.
    756.2
    B.
    780.5
    C.
    801.5
    D.
    880.5

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  3. 1 kg/cm2 is equal to

  4. A.
    760 torr
    B.
    1KPa
    C.
    10 metres of water column
    D.
    1 metre of water column

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  5. An azeotropic solution of two liquids has boiling point lower than either of them, when it

  6. A.
    is saturated.
    B.
    is unsaturated.
    C.
    shows negative deviation from Raoult's law.
    D.
    shows positive deviation from Raoult's law.

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  7. For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become

  8. A.
    P/3
    B.
    3P
    C.
    9P2
    D.
    9P

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  9. 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 latent heat of condensation (kJ/kg-1 ) under these conditions is

  10. A.
    40732
    B.
    2676
    C.
    2263
    D.
    540

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  11. Ideal solution is formed, when its components have zero

  12. A.
    heat of mixing.
    B.
    volume change.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

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  13. Pick out the wrong statement:

  14. A.
    A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure.
    B.
    A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a 'superheated vapor'.
    C.
    The temperature at which a vapor is saturated is termed as the boiling point.
    D.
    The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its 'degree of superheat'.

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  15. 'Giga' stands for

  16. A.
    109
    B.
    10-12
    C.
    1012
    D.
    1015

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  17. The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

  18. A.
    phase rule
    B.
    experimental data
    C.
    emperical equations
    D.
    theoretical equations

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  19. The effect of pressure on the heat capacity of the gases __________ is negligible.

  20. A.
    at pressure below one atmosphere
    B.
    below the critical temperature
    C.
    both(a)&(b)
    D.
    neither (a) nor (b)

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