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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.

    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
    • 2.

    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
    • 3.

    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
    • 4.

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

    • Invar

    • Steel

    • Bell metal

    • Bell metal

    Answer
    • 5.

    Which one of the following is a mineral of iron?

    • Malachite

    • Cassiterite

    • Pyrolusite

    • Magnetite

    Answer
    • 6.

    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
    • 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.

    '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
    • 9.

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

    • Carbon

    • Silicon

    • Phosphorus

    • Phosphorus

    Answer
    • 10.

    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
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