How many of the following process of refining is/are chemical metho...

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