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Chemical Engineering :: Chemical Process

  1. Dacron (or terylene) fibres as compared to nylon's fibres have

  2. A.

     Better heat & acid resistant properties

    B.

     Poorer resistance to alkalis

    C.

     Poorer dyeability

    D.

     All of the above

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  3. In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

  4. A.

     Gives higher conversion efficiency

    B.

     Has a longer life and is not poisoned by arsenic

    C.

     Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant

    D.

     All of the above

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  5. Which of the following contains least amount of N₂?

  6. A.

     Coke oven gas

    B.

     Blast furnace gas

    C.

     Producer gas

    D.

     Water gas (blue gas)

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  7. __________ is used as a flux in the smelting of copper ore like chalcopyrite.

  8. A.

     Coke breeze

    B.

     Lime powder

    C.

     Silica/quartz

    D.

     Dolomite

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  9. A unit operation is exemplified by the process of

  10. A.

     Reduction

    B.

     Desorption

    C.

     Nitration

    D.

     Combustion

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  11. Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

  12. A.

     Calcium sulphate

    B.

     Sodium chloride

    C.

     Sodium sulphate

    D.

     Magnesium chloride

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  13. Which of the following is an ore of iron?

  14. A.

     Galena

    B.

     Chalcopyrite

    C.

     Hematite

    D.

     Bauxite

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  15. Dichloro diphenyl __________ is the full form of DDT (an insecticide).

  16. A.

     Tetrachloroethane

    B.

     Trichloroethane

    C.

     Tetrachloromethane

    D.

     Trichloromethane

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  17. Which of the following processes is absent in glass manufacturing process?

  18. A.

     Sintering

    B.

     Annealing

    C.

     Shaping or forming

    D.

     Melting

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  19. A good quality coal should have

  20. A.

     Low fusion point of ash

    B.

     High ash content

    C.

     High sulphur content

    D.

     None of these

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