JEE Advanced levelOne or more correct optionsDifficulty 3 of 3mt165
Which statements about refining of metals are correct?
Ain electrolytic refining of copper, the pure copper plate is the anode
Bpoling with green wood is used to remove dissolved CuX2O from blister copper
Cin the Parkes process, silver is more soluble in molten lead than in molten zinc
Din the Parkes process, zinc is added to molten lead so that silver passes into the zinc-rich layer that floats on the lead
Answer: B, D
Poling reduces CuX2O. In the Parkes process zinc is immiscible with lead and silver is much more soluble in zinc, so the Zn-Ag alloy floats as a crust. In copper refining the impure metal is the anode and pure copper the cathode.