JEE Main & Advanced Sample Paper JEE Main Sample Paper-38

  • question_answer 21) Removal of \[Fe,Cu,W\] from Sn metal after smelting is by ...............because.............

    A)  Poling; of more affinity towards oxygen for impurities

    B)  Selective oxidation; of more affinity towards oxygen for impurities

    C)  Electrolytic refining; impurities undissolved in electrolyte

    D)  Liquation; Sn having low melting point compared to impurities.

    Correct Answer: D

    Solution :

     Liquation is the principle based on difference in melting points.

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