Question 31
Nutrient CyclingWhich of the following gases is released during the decomposition of organic matter?
- A.Carbon (II) oxide
- B.Sulphur (IV) oxide
- C.Hydrogen sulphide
- D.Nitrous oxide
Show the answer and explanation
Answer: C (Hydrogen sulphide)
Explanation
When proteins in dead matter rot, their sulphur is released as hydrogen sulphide, the gas that gives decay its rotten-egg smell. Carbon (II) oxide comes from incomplete burning, not decay.