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Chemical Engineering :: Chemical Process

  1. Which is the most efficient absorbant for SO₃ out of the following?

  2. A.

     20% oleum

    B.

     65% oleum

    C.

     78%H₂SO₄

    D.

     98%H₂SO₄


  3. Starting raw material for the manufacture of alum is

  4. A.

     Alumina

    B.

     Gypsum

    C.

     Bauxite

    D.

     Ammonium bicarbonate


  5. Frasch process is for

  6. A.

     Making oxygen

    B.

     Producing helium

    C.

     Mining sulphur

    D.

     Making nitrogen


  7. Very fine suspended and colloidal impurities are removed from water by a process called

  8. A.

     Sedimentation

    B.

     Coagulation

    C.

     Disinfection

    D.

     Softening


  9. Fumigant insecticides

  10. A.

     Kill insects, when they eat it

    B.

     Emit poisonous vapour

    C.

     Are absorbed throughout the plant

    D.

     None of these


  11. Fusel oil is a/an

  12. A.

     Essential oil

    B.

     Extract from medicinal herbs

    C.

     Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses)

    D.

     None of these


  13. Which of the following is a constituent of coffee?

  14. A.

     Caffeine

    B.

     Nicotine

    C.

     Calgon

    D.

     Lignin


  15. Which of the following is an endothermic reaction?

  16. A.

     Absorption of SO₃ in 98% H₂SO₄

    B.

     C + H₂O = CO + H₂

    C.

     Thermal dissociation of iron pyrites

    D.

     Both B and C


  17. Salt is added in the kettle during soap manufacture to separate

  18. A.

     Soap from lye

    B.

     Glycerine from lye

    C.

     The metallic soap

    D.

     The unsaponified fat from soap


  19. High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

  20. A.

     Flocculate the impurities

    B.

     Facilitate fast filtration

    C.

     Both A and B

    D.

     Neither A nor B