Question

High purity copper is obtained by:

• A. carbon reduction process
• B. hydrogen reduction process
• C. electrolytic reduction process
• D. thermit process

Answer 1

Answer: (C)

electrolytic reduction process

Copper is a metal having +ve electrode potential. So it quite favourable for reduction by suitable reducing agent. Copper is refined from Poling and Electrolytic Reduction Process. But in Poling some gases does not evolve. So, low purity occurs in Poling. But in Electrolytic Reduction, pure Copper comes to cathode without impurities.