12th Class Chemistry Metallurgy / धातुकर्म Question Bank 12th CBSE Chemistry Metallurgy

  • question_answer
      how is gold extracted from its ore?

    Answer:

      The graphical representation of Gibbs energy of formation  of oxide with temperature is known as Ellingham diagram.  Limitations:                                          (i) It does not say about kinetics of reaction           (ii) It presumes that reactant and product are  in equilibrium. This is not always true because reactant/product may be solid.     


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