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Question

How many of the following process of refining is/are chemical methods. ___
(i) Liquation                             (ii) Fractional distillation process
(iii) Zone refining method        (iv) Chromatographic method 
(v) Cupellation                         (vi) Poling
(vii) Hoopes process               (viii) Kroll’s process
(ix) Mond’s process


Solution

v, vi, vii, viii, ix are chemical methods.  

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