Home / Chemical Engineering / Chemical Process :: Section-15

Chemical Engineering :: Chemical Process

  1. Main product in calcium carbide-water reaction is

  2. A.

     Ca(OH)₂

    B.

     C₂H₂

    C.

     CO₂

    D.

     CaCO₃


  3. CaCl(OCl) is the chemical formula of

  4. A.

     Hypo

    B.

     Bleaching powder

    C.

     Plaster of paris

    D.

     Aqua regia


  5. Carboxymethyl cellulose (CMC) is added in detergents to

  6. A.

     Prevent redeposition of soil on cleaned surface

    B.

     Act as optical brightening agent

    C.

     Inhibit corrosion in washing machines made of aluminium

    D.

     None of these


  7. Which of the following is used as a coagulant in water treatment?

  8. A.

     Chloramine

    B.

     Chlorine

    C.

     Ferrous sulphate

    D.

     Hydrogen peroxide


  9. Coal tar is used as a

  10. A.

     Binding material for coal briquettes

    B.

     Fuel in rotary kiln

    C.

     Binder in making carbon electrodes

    D.

     All of the above


  11. The process involved in converting rubber into a thin sheet or coating it on fabric is called

  12. A.

     Extrusion

    B.

     Mastication

    C.

     Calendering

    D.

     Valcanisation


  13. Raw material used in alcohol distilleries in India is

  14. A.

     Molasses

    B.

     Benzol

    C.

     Methylated spirit

    D.

     None of these


  15. Fermentation of molasses to produce ethyl alcohol is done at __________ °C

  16. A.

     20 - 30

    B.

     < - 5

    C.

     100 - 150

    D.

     250 - 300


  17. The end bleaching agent used to move last traces of colour bodies from the pulp is

  18. A.

     Chlorine dioxide (ClO₂)

    B.

     MgO

    C.

     SO₂ gas

    D.

     Mercaptans


  19. Styrene-butadiene-rubber (SBR) as compared to natural rubber has

  20. A.

     Poorer tensile strength

    B.

     Poorer resistance to oxidation

    C.

     Greater amount of heat build-up under heavy loading

    D.

     All of the above