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Chemical Engineering :: Stoichiometry

  1. Kopp's rule is helpful in finding the

  2. A.
    heat capacities of solids.
    B.
    heat capacities of gases.
    C.
    molal heat capacities of gases.
    D.
    activation energy.

  3. 1 gm mole of methane (CH4) contains

  4. A.
    6.02 x 1023 atoms of hydrogen.
    B.
    4 gm atoms of hydrogen.
    C.
    3.01 x 1023 molecules of methane.
    D.
    3 gms of carbon.

  5. Number of gm moles of solute dissolved in one litre of a solution is called its

  6. A.
    equivalent weight
    B.
    molarity
    C.
    molality
    D.
    normality

  7. A chemical process is said to occur under unsteady state, if the

  8. A.
    inventory changes do not take place.
    B.
    ratio of streams entering/leaving are independent of time.
    C.
    flow rates & composition both are time dependent.
    D.
    none of these.

  9. 1 centipoise is equivalent to

  10. A.
    1 gm/cm.second
    B.
    1 centistoke
    C.
    2.42 lb/ft.hr
    D.
    2.42 lb/ft.second

  11. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is

  12. A.
    doubled.
    B.
    halved.
    C.
    trebled.
    D.
    unpredictable.

  13. Isotonic solutions must have the same

  14. A.
    viscosity
    B.
    molar concentration
    C.
    normality
    D.
    critical temperature

  15. The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is

  16. A.
    0.4
    B.
    0.6
    C.
    0.8
    D.
    0.2

  17. __________ kg of CaC03 on heating will give 56 kg of CaO.

  18. A.
    56 .
    B.
    100
    C.
    144
    D.
    1000

  19. Enthalpy of formation of NH3 is - 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to __________ kJ/kg. mole.

  20. A.
    46
    B.
    92
    C.
    -23
    D.
    -92