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Chemical Engineering :: Chemical Process

  1. Vulcanisation of rubber

  2. A.
    decreases its tensile strength.
    B.
    increases its ozone & oxygen reactivity.
    C.
    increases its oil & solvent resistance.
    D.
    converts its plasticity into elasticity.

  3. Raw materials for 'Solvay Process' for manufacture of the soda ash are

  4. A.
    salt, limestone and coke or gas.
    B.
    ammonia, salt and limestone.
    C.
    ammonia limestone and coke.
    D.
    none of these.

  5. Chloral is used in the manufacture of

  6. A.
    DDT
    B.
    BHC
    C.
    parathion
    D.
    none of these

  7. Bromine is used in the preparation of

  8. A.
    fire extinguishing compounds.
    B.
    fire proofing agents.
    C.
    dyes and antiknock compounds.
    D.
    all (a), (b) and (c).

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

  10. A.
    low co-efficient of expansion.
    B.
    high co-efficient of expansion.
    C.
    high melting point.
    D.
    both (b) and (c).

  11. The process used for the manufacture of ethyl alcohol from molasses is

  12. A.
    distillation
    B.
    dehydration
    C.
    dehydrogenation
    D.
    none of these

  13. Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

  14. A.
    75
    B.
    < 10
    C.
    > 30
    D.
    50

  15. Absorption of SO3 in 97% H2SO4 is

  16. A.
    exothermic
    B.
    endothermic
    C.
    not possible
    D.
    none of these

  17. __________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

  18. A.
    Solvay
    B.
    Ostwald's
    C.
    Haber's
    D.
    none of these

  19. Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

  20. A.
    fertiliser manufacture
    B.
    car battery solution
    C.
    synthesis of oleum
    D.
    water treatment