Question

question 7 (2 points)
what element is always present in an organic compound?

1. hydrogen
2. oxygen
3. glucose
4. carbon

Explanation:

Organic compounds are defined as chemical compounds that contain carbon as their core element. While many organic compounds include hydrogen, oxygen, or other elements, there are exceptions (e.g., carbon tetrachloride, $\text{CCl}_4$, has no hydrogen or oxygen). Glucose is a specific organic compound, not an element. Carbon is the only element universally present in all organic compounds.

Answer:

1. Carbon