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Chemical Process - Section-15
  1. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively

    2. A.

     V₂O₅ & Cr₂O₃
    B.

     Oxides of nitrogen & Cr₂O₃
    C.

     V₂O₅ on a porous carrier & oxides of nitrogen
    D.

     Oxides of nitrogen & V₂O₅ on a porous carrier

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  2. Favourable conditions for the liquefaction of gases in general are

    3. A.

     High pressure & low temperature
    B.

     Low pressure & high temperature
    C.

     High pressure & high temperature
    D.

     Low pressure & low temperature

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  3. Polycaprolactum is commercially known as

    4. A.

     Nylon-6
    B.

     Nylon-66
    C.

     Dacron
    D.

     Rayon

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  4. Plasticisers are added to synthetic plastics to

    5. A.

     Impart flexibility
    B.

     Improve workability during fabrication
    C.

     Develop new improved properties not present in the original resins
    D.

     All of the above

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  5. Main constituent of dolomite is

    6. A.

     CaCO₃
    B.

     MgCO₃
    C.

     K₂CO₃
    D.

     Na₂CO₃

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  6. The major constituents of glass are

    7. A.

     Lime, clay and soda ash
    B.

     Sand, lime and soda ash
    C.

     Silica, alumina and clay
    D.

     Silica, alumina and soda ash

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  7. Bakelite is chemically known as

    8. A.

     Polyvinyl chloride (PVC)
    B.

     Polybutadiene
    C.

     Phenol formaldehyde
    D.

     Polyurathane

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  8. __________ nature of hypo (sodium thiosulphate) makes it useful in photography.

    9. A.

     Oxidising
    B.

     Reducing
    C.

     Complex forming
    D.

     Photochemical

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  9. Sizing material is incorporated in paper to

    10. A.

     Impart resistance to penetration by liquids
    B.

     Increase its thickness
    C.

     Increase its flexibility & opacity
    D.

     Increase its brightness

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  10. Chemical name of Grignard reagent is

    11. A.

     Sodium thiosulphate
    B.

     Ethyl magnesium chloride
    C.

     Sodium sulphite
    D.

     Sodium bicarbonate

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