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Chemical Engineering :: Chemical Process

  1. Permanent hardness of water can be removed by

  2. A.

     Boiling

    B.

     Adding Ca(OH)₂

    C.

     Boiling it with Na₂CO₃

    D.

     None of these


  3. Permanent hardness of water can be removed by

  4. A.

     Addition of soda ash to it

    B.

     Treating it with zeolites

    C.

     Passing it through sodium hexametaphosphate

    D.

     All of the above


  5. Esterification reaction

  6. A.

     Produces soap

    B.

     Is reversible

    C.

     Is a reaction between an alcohol and an organic acid

    D.

     All of the above


  7. Polymethyl methacrylate (PMMA) is known as

  8. A.

     Bakelite

    B.

     Teflon

    C.

     Perspex

    D.

     Nylon-6


  9. The process used for the manufacture of ethyl alcohol from molasses is

  10. A.

     Distillation

    B.

     Dehydration

    C.

     Dehydrogenation

    D.

     None of these


  11. Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

  12. A.

     Phthalic anhydride

    B.

     Vinyl chloride

    C.

     Maleic anhydride

    D.

     Dacron


  13. Thermal pyrolysis of ethylene dichloride produces

  14. A.

     Trichloroethylene

    B.

     Vinyl chloride

    C.

     Ethanol amine

    D.

     Ethylene oxide


  15. Concentration of hydrogen peroxide is done by

  16. A.

     Crystallisation

    B.

     Vacuum crystallisation

    C.

     Atmospheric distillation

    D.

     Dehydration


  17. Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.

  18. A.

     10

    B.

     50

    C.

     80

    D.

     95


  19. Molecular weights of polymers are in the range of

  20. A.

     10² - 10²

    B.

     10⁵ - 10⁹

    C.

     10² - 10⁷

    D.

     10⁹ - 10¹¹