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Chemical Engineering :: Chemical Process

  1. Plasticisers are added to paints to

  2. A.

     Make it corrosion resistant

    B.

     Make glossy surface

    C.

     Give elasticity & prevent cracking of the film

    D.

     Increase atmospheric oxidation


  3. Pick out the correct statement.

  4. A.

     A fat is converted into oil by its hydrogenation

    B.

     There is no difference between a fat and an oil so far as its physical properties are concerned

    C.

     All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms

    D.

     Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content


  5. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?

  6. A.

     AgO

    B.

     Al2O₃

    C.

     ZnCl₂

    D.

     FE₂O₃


  7. Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

  8. A.

     Reverse osmosis

    B.

     Sand filter

    C.

     Lime soda

    D.

     Permutit


  9. Stereospecific agents are exemplified by

  10. A.

     Radiation

    B.

     Supported metal oxide catalysts

    C.

     Ziegler catalysts

    D.

     All of the above


  11. High purity nitrogen is used in

  12. A.

     Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils

    B.

     Fire fighting purposes

    C.

     Both A & B

    D.

     Neither A nor B


  13. Which of the following impurities in feed water for high pressure boiler is the most detrimental?

  14. A.

     Silica

    B.

     Dissolved oxygen

    C.

     Suspended salt

    D.

     Dissolved salt


  15. Essential oils are usually obtained using

  16. A.

     Steam distillation

    B.

     Extractive distillation

    C.

     Solvent extraction

    D.

     Leaching


  17. Cooking liquor in case of sulphite process is

  18. A.

     Sodium sulphite and sodium bisulphite

    B.

     Magnesium sulphite and free SO₂ in acid medium

    C.

     Magnesium sulphate and magnessium bicarbonate

    D.

     None of these


  19. The main component of pyrex glass is

  20. A.

     Zinc

    B.

     Lead

    C.

     Boron

    D.

     Celenium