Electrolytic Refining
Trending Questions
Q. Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of
(IIT-JEE, 2008)
(IIT-JEE, 2008)
- Oxygen
- Carbon dioxide
- Argon
- Nitrogen
Q.
In the electrolytic refining of Copper (electrolyte is CuSO4 solution + dil H2SO4 ;Pure Cu cathode and Impure Cu anode), metallic impurities having lower oxidation potential than Cu are deposited as
Q. When copper metal is refined by electrolytic method, incorrect statement is
- Anode is made of impure metal while pure metal is cathode
- CuSO4 can be used as electrolyte
- During electrolysis impurities collected as anode mud
- Anode is made of pure metal while cathode is made of impure metal
Q.
In electrolytic refining, the impure metal acts as anode.
True
False
Q. Copper is purified by the electrolytic refining of blister copper. The correct statement(s) about this process is/are:
- impure Cu strip is used as cathode
- acidified aqueous CuSO4is used as electrolyte
- pure Cu deposits at cathode
- impurities settle as anode mud
Q. In the electrolytic refining of copper using CuSO4 as the electrolyte, the anode reaction is
- 4OH−(aq)→O2(g)+2H2O(l)+4e−
- Cu2+(aq)+2e−→Cu(s)
- 2SO2−4(aq)→S2O2−8(aq)+2e−
- Cu(s)→Cu2+(aq)+2e−
Q.
Out line the principles of refining metals by the following method:
Zone refining
Electrolytic refining
Vapour phase refining
Q.
Name the common elements presents in the anode mud in electrolytic refining of copper. Why are they so present?
Q.
During the process of electrolytic refining, the pure metal is deposited at the ________.
- anode
- initially at cathode and then at anode
- cathode
- bottom of the solution
Q.
Pure gold is equal to
24 carat
10 carat
22 carat
26 carat