JEE Main Chemistry question

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

Not in JEE Main or NEET syllabus

During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are [AIEEE 2005]

(A)Fe and Ni
(B)Ag and AuCorrect
(C)Pb and Zn
(D)Se and Ag

Answer: (B)

Solution

Noble metals such as Ag and Au present as impurities in the impure copper anode are not oxidised/dissolved during electrorefining; being chemically inert at the anode potential,

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Question ID VK-145287