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General Princip...

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  • Question 1
    4 / -1

    Observe the following statements regarding purification of bauxite.
    I. During Hall's process, silica is removed as Si (vapour).
    II. Bauxite ore contaminated with Fe2O3 is purified in Baeyer's process.
    III. During Serpeck's process, AIN is formed.
    The correct answer is

  • Question 2
    4 / -1

    From the Ellingham graph on carbon, which of the following statements is false?

  • Question 3
    4 / -1

    Carbon cannot be used in the reduction of Al2O3 because

  • Question 4
    4 / -1

    When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurities. This can be removed as slag during reduction of CuO. The flux added to form slag is

  • Question 5
    4 / -1

    During the extraction of gold, the following reactions take place

  • Question 6
    4 / -1

    The metallurgical process in which a metal is obtained in a fused state is called

  • Question 7
    4 / -1

    Sulphide ore of zinc/copper is concentrated by

  • Question 8
    4 / -1

    Cyanide process is used for obtaining

  • Question 9
    4 / -1

    Which of the following is not an ore?

  • Question 10
    4 / -1

    Which method of purification is represented by the following equations ?

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