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- Try this! When the sample of copper wth zinc impurity is to be purified by electrolysis, the appropriate electrodes are
- #Engineering
- #Chemistry
- #Joint Entrance Examination Main
- #General Principle and process of Isolation of metals
When the sample of copper wth zinc impurity is to be purified by electrolysis, the appropriate electrodes are
- Option 1)
cathode anode
pure zinc pure copper
- Option 2)
cathode anode
impure sample pure copper
- Option 3)
cathode anode
mpure zinc impure sample
- Option 4)
cathode anode
pure copper impure sample.
Answers (1)
As we learnt in
Electrolytic Refining -
Many of the metals such as Cu,Au,Ag,Al,Hb etc are purified by this method.
- wherein
The impure metal is made anode while a thin sheet of pure metal acts as a cathode.
Impure metal is taken as anode as it dissolves while pure metal deposits on cathode after reduction of metal cations
Option 1)
cathode anode
pure zinc pure copper
This option is incorrect
Option 2)
cathode anode
impure sample pure copper
This option is incorrect
Option 3)
cathode anode
mpure zinc impure sample
This option is incorrect
Option 4)
cathode anode
pure copper impure sample.
This option is correct
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