Question

Complete the table given below:
Nature of Anode Nature of Cathode Ions present in electrolyte Ion/s discharged at Cathode / Anode
1. Electroplating an iron rod with silver
2. Electroplating a copper sheet with nickel
3. Electrorefining of silver
4. Extraction of potassium from KCl
5. Extraction of aluminium from Al2O3

  • Electrolysis
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Answer

The completed table is given below:

Nature of Anode Nature of Cathode Ions present in electrolyte Ion/s discharged at Cathode / Anode
1. Electroplating an iron rod with silver Silver Iron rod Na+, CN–, Ag+ Cathode : Ag+
Anode : Nil
2. Electroplating a copper sheet with nickel Nickle Copper sheet Ni2+, SO42- Cathode : Ni2+
Anode : Nil
3. Electrorefining of silver Impure silver Pure silver Ag+, NO3– Cathode : Ag+
Anode : Nil
4. Extraction of potassium from KCl Graphite Iron K+, Cl– Cathode : K+
Anode : Cl–
5. Extraction of aluminium from Al2O3 Graphite Graphite Al3+, O2- Cathode : Al3+
Anode : O2-

 

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