Purification or Refining of metals : Metals obtained by reduction processes still contain some objectionable impurities and have to be refined Numerous techniques are available , including the following : Physical methods:These methods include the following processes : (I) Liquation process(II)Fractional distillation process (III)Zone refining method(IV)Chromatographic methods Chemicalmethods : These methods include the following methods : (I)Oxidative refining (II)Poling process (III)Electrolytic refining(IV)Vapour phase refining Now answer the following questions . Select the INCORRECT statement :

Purification or Refining of metals : Metals obtained by reduction pro

1.	Purification or Refining of metals : Metals obtained by reduction processes still contain some objectionable impurities and have to be refined Numerous techniques are available , including the following : Physical methods:These methods include the following processes : (I) Liquation process(II)Fractional distillation process (III)Zone refining method(IV)Chromatographic methods Chemicalmethods : These methods include the following methods : (I)Oxidative refining (II)Poling process (III)Electrolytic refining(IV)Vapour phase refining Now answer the following questions . Select the INCORRECT statement :
Answer» Poling process used in purification of COPPER & tin involves reduction of impurities present Electrolytic refining is DONE for reactive metal Al as well as less reactive metal Cu. Refining of metal obtained from cassiterite ore involves removal of copper impurity Vapour PHASE refining involves oxidation of metal to be refined, followed by its reduction at a HIGHER temperature. Solution :Refining of metal obtained from cassiterite ore involves removal of iron impurity.