Multiple choice

Which of the following is the copper ore with the least purity?

  1. Tennantite

  2. Azurite

  3. Malachite

  4. Covellite

  5. Chalcocite

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tennantite (Cu12As4S13) is 51.6% of copper. Hence it is the least pure.