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Chemical Engineering :: Chemical Process

  1. Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

  2. A.

     Depithing

    B.

     Digestion

    C.

     Bleaching

    D.

     None of these

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  3. Black liquor is converted into white liquor by

  4. A.

     Evaporation and burning the concentrate followed by causticisation of products

    B.

     Multi-effect evaporation only

    C.

     Selective liquid extraction

    D.

     Extractive distillation

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  5. Glycerine is a by-product of the __________ industry.

  6. A.

     Soap

    B.

     Detergent

    C.

     Oil hydrogenation

    D.

     Paint

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  7. Sudden temperature fluctuation does not affect pyrex glass, because of its

  8. A.

     Low co-efficient of expansion

    B.

     High co-efficient of expansion

    C.

     High melting point

    D.

     Both B and C

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  9. Starting material for the production of butadiene in India is

  10. A.

     Naphthalene

    B.

     Benzol

    C.

     Ethyl alcohol

    D.

     Phthalic anhydride

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  11. Commercial production of calcium carbide requires limestone and __________ as raw materials.

  12. A.

     Coke

    B.

     Sand

    C.

     Soda ash

    D.

     Fuel oil

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  13. Paper pulp produced by kraft/sulphate process is

  14. A.

     Bleached easily

    B.

     Dull white in color

    C.

     Strong fibrous

    D.

     Dark colored

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  15. Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on

  16. A.

     Slaked lime

    B.

     Soda lime

    C.

     Calcium perchlorate

    D.

     None of these

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  17. Good quality of edible salt is obtained from brine by the process of

  18. A.

     Solar evaporation

    B.

     Vacuum evaporation

    C.

     Freeze drying

    D.

     Electrolysis

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  19. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

  20. A.

     Surfactant

    B.

     Builder

    C.

     Optical brightening agent

    D.

     Anti soil redeposition agent

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