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Chemical Engineering :: Chemical Process

  1. Which of the following is a detergent?

  2. A.

     Fatty alcohol

    B.

     Alkyl benzene sulphonate (ABS)

    C.

     Fatty acids

    D.

     Methylene chloride

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  3. The main use of HCl is in the

  4. A.

     Drilling of petroleum wells and pickling of steel sheets

    B.

     Manufacture of cationic detergent

    C.

     Treatment of spent fuel of nuclear reactor

    D.

     None of these

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  5. The major use of butadiene is

  6. A.

     As a plasticiser for unsaturated polyester

    B.

     In the manufacture of synthetic rubber

    C.

     As an anti-skinning agent in paint

    D.

     None of these

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  7. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

  8. A.

     Adjust the pH of the syrup

    B.

     Remove the coloring matter from the syrup

    C.

     Reduce the viscosity of the syrup

    D.

     Improve the rate of crystallisation of sugar

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  9. The most commonly used substance to speed up the sedimentation of sewage is

  10. A.

     Lime

    B.

     Sulphuric acid

    C.

     Chlorine

    D.

     Sodium bisulphite

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  11. Thermoplastic materials

  12. A.

     Do not soften on application of heat

    B.

     Are heavily branched molecules

    C.

     Are solvent insoluble

    D.

     None of these

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  13. Thermosetting materials

  14. A.

     Are cross-linked molecules

    B.

     Soften on application of heat

    C.

     Are solvent soluble

    D.

     None of these

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  15. Thorium is mainly used

  16. A.

     For the manufacture of gas mantles

    B.

     As a fissile fuel in a nuclear reactor

    C.

     In the manufacture of hydrogen bomb

    D.

     In the treatment of cancer

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  17. Styrene is produced from ethyl benzene by the process of

  18. A.

     Dehydrogenation

    B.

     Oxidation

    C.

     Alkylation

    D.

     Dehydration

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  19. Styrene is produced from ethyl benzene by the process of

  20. A.

     Dehydrogenation

    B.

     Oxidation

    C.

     Alkylation

    D.

     Dehydration

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