In the electrolytic refining process of zinc, it is given that the crude metal is made anode while the electrolyte is used is $H_{2} S O_{4}$ (dilute) + $Z n S O_{4}$ . The cathode should be:

Pure Zinc

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Zn-Hg Amalgam

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Aluminum

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All of the above

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Solution

The correct option is C
Aluminum

For the given electrolyte, Pure Zinc cathode gets dissolved in dilute $H_{2} S O_{4}$ and thus is impractical. Hence Aluminium is used as the cathode.

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Q. Question 38
During extraction of metals, electrolytic refining is used to obtain pure metals.
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In general, electrolytic refining is a process of purification of impure metal during which an electric current is passed through an electrolytic cell which contains impure metal as anode, a suitable electrolyte and pure metal as cathode.

Q. State whether the following statement is True or False:
In the process of electrolytic refining, the pure metal from anode gets dissolved into the electrolyte and the equivalent amount of metal is deposited onto the cathode from the electrolytic solution.

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In the electrolytic refining process of zinc, it is given that the crude metal is made anode while the electrolyte is used is H2SO4 (dilute) + ZnSO4. The cathode should be:

The correct option is C Aluminum For the given electrolyte, Pure Zinc cathode gets dissolved in dilute H2SO4 and thus is impractical. Hence Aluminium is used as the cathode.

In the electrolytic refining process of zinc, it is given that the crude metal is made anode while the electrolyte is used is $H_{2} S O_{4}$ (dilute) + $Z n S O_{4}$ . The cathode should be:

The correct option is C
Aluminum

For the given electrolyte, Pure Zinc cathode gets dissolved in dilute $H_{2} S O_{4}$ and thus is impractical. Hence Aluminium is used as the cathode.