Multiple choice

When impurities are present in minerals, the term used is _______.

  1. ore

  2. gangue

  3. oxides

  4. agent

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

Gangue refers to the commercially valueless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. Ore is the mineral itself, while oxides and agents are chemical categories or roles, not terms for impurities.