Multiple choice

Which of the following is the combined state of carbon?

  1. Carbon dioxide

  2. Fossil fuels

  3. Organic compounds

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon exists in nature in both free states (diamond, graphite) and combined states (carbon dioxide, carbonates, hydrocarbons/fossil fuels, organic compounds).

Keep practicing — related questions