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Chemical Process - Section-15
  1. Roasting of metallurgical ores is done mainly to

    2. A.

     Dehydrate it
    B.

     Sinter the ore
    C.

     Remove CO₂ & H₂O
    D.

     Remove arsenic & sulphur

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  2. Lurgi coal gasifier is a pressurised __________ bed reactor.

    3. A.

     Moving
    B.

     Fixed
    C.

     Fluidised
    D.

     Entrained

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  3. Manufacture of phthalic anhydride uses __________ as a catalyst.

    4. A.

     Ni
    B.

     Cr
    C.

     V₂O₅
    D.

     Al₂O₃

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  4. Pure rectified spirit contains about __________ percent alcohol.

    5. A.

     45
    B.

     70
    C.

     95
    D.

     99.5

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  5. Vanillin is a type of

    6. A.

     Anti-pyretic drug
    B.

     Food preservative
    C.

     Flavour
    D.

     Dye

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  6. Varnish does not contain

    7. A.

     Thinner
    B.

     Pigment
    C.

     Both A & B
    D.

     Neither A nor B

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  7. Varnish does not contain

    8. A.

     Pigment
    B.

     Thinner
    C.

     Dryer
    D.

     Anti-skimming agent

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  8. In the production of soda ash by Solvay process, the by-product is

    9. A.

     CaCl₂
    B.

     NH₄Cl
    C.

     NH₃
    D.

     NaOH

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  9. Use of water having dissolved oxygen in boilers promotes

    10. A.

     Corrosion
    B.

     Sequestration
    C.

     Scale formation
    D.

     None of these

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  10. Chrome tanning and vegetable tanning are done for

    11. A.

     Light & heavy leather respectively
    B.

     Heavy & light leather respectively
    C.

     Both light & heavy leather
    D.

     Neither light nor heavy leather

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