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    CBSE

    Subject

    Chemistry
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    NEET Chemistry : General Principles And Processes of Isolation Of Elements

    Multiple Choice Questions

    1.

    Which of the following pairs of metals is purified by van Arkel method?

    • Zr and Ti

    • Ag and Au

    • Ni and Fe

    • Ni and Fe

    Answer
    • 2.

    Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with the choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

    • H2S

    • SO2

    • CO2

    • CO2

    Answer
    • 3.

    In the extraction of copper from its sulphide ore, the metal finally obtained by the reduction of cuprous oxide with 

    • Iron (II) sulphide

    • Carbon monoxide

    • Copper (I) sulphide

    • Copper (I) sulphide

    Answer
    • 4.

    'Metals are usually not found as nitrates in their ores'
    Out of the following two (a and b) reasons which isare/are true for the above observation?
    I. Metal nitrates are highly unstable.
    II.Metal nitrates are highly soluble in water.

    • I and II are true

    • I and II are false

    • I is false but II is true

    • I is false but II is true

    Answer
    • 5.

    Identify the alloy containing a non-metal as a constituent in it.

    • Invar

    • Steel

    • Bell metal

    • Bell metal

    Answer
    • 6.

    Which one of the following is a mineral of iron?

    • Malachite

    • Cassiterite

    • Pyrolusite

    • Magnetite

    Answer
    • 7.

    Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of 

    • Al2O3 +HF +NaAlF4

    • Al2O3 + CaF2 +NaAlF4

    • Al2O3 +Na3AlF6 +CaF2

    • Al2O3 +KF +Na3AlF6

    Answer
    • 8.

    Which of the following elements is present as the impurity to the maximum extent in the big iron?

    • Carbon

    • Silicon

    • Phosphorus

    • Phosphorus

    Answer
    • 9.

    In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

    • Copper (I) sulphide (Cu2S)

    • sulphur dioxide (SO2)

    • Iron sulphide (FeS)

    • Iron sulphide (FeS)

    Answer
    • 10.

    Match items of Columns I with the items of Columns II and assign the correct code.

    Column I

    Column II

    A.Cyanide process

    1.Ultrapure Ge

    B. Froth floatation process

    2.Dressing of ZnS

    C.Electrolytic reduction

    3.Extraction of Al

    D.Zone refining

    4.Extraction of Au

     

    5.Purification of Ni
    • A
      B
      C
      D
        2       3     1     5
    • A
      B
      C
      D
        1      2      3     4
    • A
      B
      C
      D
         3     4      5     1
    • A
      B
      C
      D
         3     4      5     1
    Answer
    • 1.png
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