JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

A metal which is refined by poling is

(A)Silver
(B)Sodium
(C)Blister copperCorrect
(D)Tin

Answer: (C)

Solution

Poling refines metals whose own oxide is present as an impurity, by stirring the molten metal with green wood poles that liberate reducing hydrocarbon gases; this is the classic method for converting blister copper (containing

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Question ID VK-145284