Copper may be found native that is in its pure state but is more often found in chemical combinations with ?
Correct answer: D. All of the above minerals
- A. Iron, gold and silver
- B. Gold, silver and lead
- C. Iron, lead and sulphur
- D. All of the above minerals
Explanation
Copper occurs naturally but is more commonly obtained from ores containing combinations of sulfur, iron, lead and associated precious metals such as gold and silver. Since each listed group names elements associated with copper ores, “all of the above” is the intended choice.
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