The anode used during purification of impure copper is__________.
[pure thin $C u$ sheet / thick impure $C u$ block]

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Solution

Electrolysis of copper the positive electrode anode is made up of impure copper which is to be purified. The negative electrode cathode is a bar of pure copper. The two electrodes are placed in copper sulfate solution.

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In the electrolytic refining of Copper (electrolyte is $C u S O_{4}$ solution + dil $H_{2} S O_{4}$ _;Pure Cu cathode and Impure Cu anode), metallic impurities having lower oxidation potential than Cu are deposited as __ sludge.

Q. For purification of copper, a thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from the impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of battery?

Match the column (for electrolytic refining of Cu):
$\begin{matrix} C o l u m n - I & C o l u m n - I I (a) & A n o d e & (p) & T h i n s h e e t s o f p u r e C u (b) & C a t h o d e & (q) & A n a q u e o u s s o l u t i o n o f c o p p e r s u l p h a t e c o n t a i n i n g H_{2} S O_{4} (c) & E l e c t r o l y t e & (r) & A g, A u (d) & A n o d e m u d & (s) & I m p u r e m e t a l o f C u \end{matrix}$

Q. In the electrolytic refining of Copper (electrolyte is

C u S O_{4}

solution + dil

H_{2} S O_{4}

;Pure Cu cathode and Impure Cu anode), metallic impurities having ___ than Cu are deposited as anode sludge.

Q. During electrolytic refining of copper.
(a) Pure copper acts as anode.
(b) Pure copper acts as cathode.
(c) Impure copper acts as anode.
(d) Impure copper acts as cathode.

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The anode used during purification of impure copper is__________.[pure thin Cu sheet / thick impure Cu block]

Electrolysis of copper the positive electrode anode is made up of impure copper which is to be purified. The negative electrode cathode is a bar of pure copper. The two electrodes are placed in copper sulfate solution.

The anode used during purification of impure copper is__________.
[pure thin $C u$ sheet / thick impure $C u$ block]