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Mine Gases - No. 11
Questions and answers taken from PowerPoint Presentations found on this site.


Progress Indicator:
Question 1 of 25

1.  What is carbon dioxide (CO2)?

Choices:
  1. It is a colorless gas with a foul odor which is combustible.
  2. It is a gas formed by the chemical combination of sulfur and oxygen.
  3. Carbon dioxide is a colorless, odorless, combustible gas.
  4. Carbon dioxide is a colorless and odorless gas formed by the chemical combination of carbon and oxygen.