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Chemical Engineering :: Chemical Process

  1. The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.

  2. A.
    800
    B.
    1600
    C.
    4000
    D.
    8500

  3. Which of the following is not present in bagasse fibre ?

  4. A.
    Cellulose
    B.
    Lignin
    C.
    Pentogens
    D.
    None of these

  5. Nitric acid is not used in the manufacture of

  6. A.
    detergents
    B.
    fertilisers
    C.
    aqua regia
    D.
    explosives.

  7. Naphthols are derivates of

  8. A.
    methyl amine
    B.
    naphthalene
    C.
    phenol
    D.
    xylene

  9. Fermentation is adversely affected by the

  10. A.
    presence of air.
    B.
    absence of air.
    C.
    high concentration.
    D.
    presence of ammonium salts.

  11. Extraction of __________ employs an electrolytic process.

  12. A.
    aluminium
    B.
    silver
    C.
    copper
    D.
    all (a), (b) and (c)

  13. Dechlorination of treated water is necessary to

  14. A.
    remove residual turbidity.
    B.
    reduce the bacterial load on filter.
    C.
    control taste and odour.
    D.
    remove chlorinous taste.

  15. Fire clay is __________ refractory material.

  16. A.
    a basic
    B.
    an acidic
    C.
    a neutral
    D.
    not a

  17. An oil is converted into fat by its

  18. A.
    hydrogenation
    B.
    hydrolysis
    C.
    hydrocracking
    D.
    hydration

  19. Production of one ton of cement requires about __________ tons of limestone.

  20. A.
    0.6
    B.
    1.2
    C.
    2.2
    D.
    3.8