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CMC Medical CMC-Medical VELLORE Solved Paper-2009

  • question_answer
    The process of converting hydrated alumina into anhydrous alumina is called

    A)  roasting              

    B)  smelting

    C)  dressing             

    D)  calcination

    Correct Answer: D

    Solution :

                    Concentrated hydroxide ores (hydrated alumina) are converted into their oxide (anhydrous alumina) by a process, called calcination, in which the concentrated ore is heated in a limited supply of air.


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