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Chemical Engineering :: Chemical Process

  1. Which of the following coals has the highest calorific value?

  2. A.

     Lignite

    B.

     Sub-bituminous

    C.

     Anthracite

    D.

     Peat

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  3. Bleaching action of bleaching powder is due to its __________ properties.

  4. A.

     Reducing

    B.

     Oxidising

    C.

     Disinfecting

    D.

     None of these

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  5. RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

  6. A.

     Cyclo trimethylene trinitramine

    B.

     Trinitro resorcinol

    C.

     Cyclo tetramethylene tetranitramine

    D.

     Trinitro benzene

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  7. Dechlorination of treated water is necessary to

  8. A.

     Remove residual turbidity

    B.

     Reduce the bacterial load on filter

    C.

     Control taste and odour

    D.

     Remove chlorinous taste

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  9. Deaeration of water in its treatment is necessary, as it

  10. A.

     Minimises its turbidity

    B.

     Helps in controlling its taste and odour

    C.

     Minimises its corrosiveness

    D.

     None of these

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  11. Phenol formaldehyde resin is used as an adhesive in making

  12. A.

     Laminates

    B.

     Card boxes

    C.

     Furniture

    D.

     Books

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  13. Solvent used for extraction of oil is

  14. A.

     Hexane

    B.

     Methyl ethyl ketone

    C.

     Furfurol

    D.

     None of these

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  15. Soap cannot be used with hard water, because

  16. A.

     Hard water contains sulphate

    B.

     They form insoluble calcium soaps which precipitate

    C.

     They attract back the removed dirt

    D.

     None of these

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  17. Which glass is usually used in optical work?

  18. A.

     Lead glass

    B.

     High silica (borosilicate) glass

    C.

     Photo-sensitive glass

    D.

     Fibre glass

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  19. The purpose of adding Na₂CO₃ to water of low alkalinity is to

  20. A.

     Permit the use of alum as a coagulant

    B.

     Increase the softening capacity of zeolite

    C.

     Facilitate easy regeneration of zeolite

    D.

     All of the above

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