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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

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

  4. A.

     Potential & kinetic

    B.

     Pressure

    C.

     Internal

    D.

     All of the above

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  5. The reverse process of fractional crystallisation is called

  6. A.

     Stripping

    B.

     Leaching

    C.

     Differential distillation

    D.

     Absorption

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  7. One micron is equal to

  8. A.

     10⁻⁴ mm

    B.

     10⁻⁴ cm

    C.

     10⁻⁶ m

    D.

     Both B & C

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  9. One 'Therm' is equivalent to

  10. A.

     10⁵ BTU

    B.

     10⁵ kcal

    C.

     10⁹ BTU

    D.

     10⁹ kcal

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  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

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  13. Isotopes are atoms having the same

  14. A.

     Mass number

    B.

     Number of neutrons

    C.

     Atomic mass

    D.

     None of these

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  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

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  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

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  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

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