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Chemical Engineering :: Stoichiometry

  1. Isotopes are atoms having the same

  2. A.
    mass number
    B.
    number of neutrons
    C.
    atomic mass
    D.
    none of these

  3. 500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.

  4. A.
    650
    B.
    700
    C.
    600
    D.
    375

  5. Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?

  6. A.
    RT
    B.
    C.
    (V - b)
    D.
    1/RT

  7. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

  8. A.
    AB3
    B.
    A2B3
    C.
    A2B
    D.
    AB2

  9. The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.

  10. A.
    6680
    B.
    13360
    C.
    2481
    D.
    97302

  11. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is

  12. A.
    180
    B.
    60.3
    C.
    720
    D.
    200

  13. For an ideal gas, the compressibility factor

  14. A.
    decreases with pressure rise.
    B.
    is unity at all temperature.
    C.
    is unity at Boyle's temperature.
    D.
    zero.

  15. In a neutral solution

  16. A.
    H+ ions are absent.
    B.
    OH- ions are absent.
    C.
    both H+ and OH- ions are present in very small but equal concentration.
    D.
    none of these.

  17. In __________ process, ions of salts react with water to produce acidity or alkalinity.

  18. A.
    hydration
    B.
    hydrolysis
    C.
    electrolysis
    D.
    dialysis

  19. Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.

  20. A.
    carbonate (monohydrate)
    B.
    chloride
    C.
    thiosulphate
    D.
    bisulphite