2. Solved Papers
  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    In the extraction of copper, ore is heated in the presence of air at high temperature. This process is called:

    A)  roasting        

    B)  calcination

    C)  smelting       

    D)  distillation

    Correct Answer: A

    Solution :

    Roasting-Ore is heated in the presence of air at high temperature.


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