Question

How much copper is present in deoxidized copper?

(a) > 99.9%

(b) > 99.85%

(c) > 99.5%

(d) > 99.35%

The question was posed to me in an international level competition.

The origin of the question is Copper and its Alloys in division Non Ferrous Materials of Engineering Material & Metallurgy

Answer 1

Right choice is (b) > 99.85%

Best explanation: Deoxidized copper contains over 99.85% Cu, along with As, Fe, and Bi. It is mainly used to remove cuprous oxides and reduce porosity. Arsenic deoxidized copper and arsenic touch pitch copper contain over 99.5% and 99.35% copper respectively.