Copper ores typically contain less than _________ of copper.

Copper ores typically contain less than _________ of copper.

A. 0.15%

B. 0.2%

C. 1%

D. 0.4%

This question was posed to me in examination.

This key question is from Manufacturing Processes of Copper and its Alloys in chapter Copper and its Alloys of Aerospace Materials & Processes

Correct choice is C. 1%

For explanation: Copper is found in ores in the earth’s crust. Copper oxides are found in considerable amounts but do not have a high concentration. Typically, all copper ores contain less than 1% of copper.