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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2013

  • question_answer
    When limestone is heated, \[C{{O}_{2}}\] is given off. The metallurgical operation is

    A)  smelting         

    B)  reduction

    C)  calcination       

    D)  roasting.

    Correct Answer: C

    Solution :

    : Conversion of an ore (carbonate) into its oxide by heating in absence of air is called calcination. \[\underset{Limestone}{\mathop{CaC{{O}_{3}}}}\,\xrightarrow{\Delta }\underset{\begin{smallmatrix}  Calcium \\  oxide \end{smallmatrix}}{\mathop{CaO}}\,+C{{O}_{2}}\uparrow \]


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