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During the purification of copper by ele...

During the purification of copper by electrolysis:

A

the anode used is made of copper ore

B

pure copper is deposited on the cathode

C

the impurities such as Ag, Au present in solution as ions

D

concentration of `CuSO_4` solution remains constant during dissolution of Cu

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The correct Answer is:
A, B, D
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