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  • Question 1
    1 / -0

    The process of producing a hard coating of iron nitride on the surface of steel is called

  • Question 2
    1 / -0

    The main function of roasting is

  • Question 3
    1 / -0

    Calamine is an ore of

  • Question 4
    1 / -0

    Froth floatation process for the concentration of ores is a practication of

  • Question 5
    1 / -0

    The material used in semiconductors

  • Question 6
    1 / -0

    Plumbo-solvency refers to

  • Question 7
    1 / -0

    Which of the following is manufactured by siemens martin process?

  • Question 8
    1 / -0

    The metal oxide, which cannot be reduced to metal by carbon is

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