Discussion
Bujho wants to set up a circuit for the purification of copper. Which of the following electrodes and solutions should he opt for?
Answer: C
Bujho should use Anode-Impure copper; Cathode-Pure copper; Solution-Copper sulphate.
In electrolytic refining, the impure metal is made the anode and a thin strip of pure metal the cathode, with a solution of a salt of the same metal as electrolyte. Copper dissolves from the impure anode as Cu2+ ions, travels through the copper sulphate solution and is deposited as pure copper on the cathode; impurities fall to the bottom as anode mud.
Water alone (A) does not supply copper ions or conduct well. A carbon anode (B) does not dissolve, so the impure copper is never refined. Reversing the electrodes (D) would deposit copper on the impure strip.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development