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Chemical Engineering :: Stoichiometry

  1. With rise in pressure, the solubility of gases in solvent, at a fixed temperature

  2. A.

     Increases

    B.

     Decreases

    C.

     Remains unchanged

    D.

     Decreases linearly


  3. Total energy at a point comprises of __________ energy.

  4. A.

     Potential & kinetic

    B.

     Pressure

    C.

     Internal

    D.

     All of the above


  5. The reverse process of fractional crystallisation is called

  6. A.

     Stripping

    B.

     Leaching

    C.

     Differential distillation

    D.

     Absorption


  7. One micron is equal to

  8. A.

     10⁻⁴ mm

    B.

     10⁻⁴ cm

    C.

     10⁻⁶ m

    D.

     Both B & C


  9. One 'Therm' is equivalent to

  10. A.

     10⁵ BTU

    B.

     10⁵ kcal

    C.

     10⁹ BTU

    D.

     10⁹ kcal


  11. Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

  12. A.

     Heat conservation

    B.

     Yield enhancement

    C.

     Product enrichment

    D.

     None of these


  13. Isotopes are atoms having the same

  14. A.

     Mass number

    B.

     Number of neutrons

    C.

     Atomic mass

    D.

     None of these


  15. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

  16. A.

     1225

    B.

     1335

    C.

     1525

    D.

     1735


  17. Pick out the wrong unit conversion.

  18. A.

     1 atm. = 760 mm Hg = 29.92 inch Hg = 14.7 psi = 1.013 bar = 1.013 kgf/cm²

    B.

     1 kPa = 100 bar

    C.

     1 mm Hg = 1 torr = 133.3 Pa

    D.

     None of the above


  19. Pick out the wrong unit conversion.

  20. A.

     L kgf= 9.8 Newton

    B.

     1 stoke = 1 m²/second

    C.

     1 Pascal second = 10 poise

    D.

     1 ppm = 1 ml/m³ = 1 mg/kg