End products of decomposition include which groups?

• A. Ammonia and Ammonium compounds
• B. Water and Carbon Dioxide
• C. Phosphoric acid and Sulfuric acid
• D. All of the above

Answer: (D)

When organic material decomposes, it breaks down into the components that were originally in the matter: nitrogen-containing compounds release nitrogen as ammonia and ammonium through ammonification; carbon compounds are oxidized to water and carbon dioxide; sulfur and phosphorus in the material can be released as sulfuric and phosphoric acids through mineralization and oxidation processes. Because decomposition can occur under different conditions (aerobic, anaerobic, varying pH and moisture) these groups can all appear as end products in various contexts. That breadth is why choosing all of the above makes the most sense here: you can end up with ammonia/ammonium, with water and carbon dioxide, and with phosphoric and sulfuric acids depending on the materials decomposing and the environment. In real systems, subsequent processes (like nitrification, further acid-base reactions, or mineral precipitation) can alter or further transform these products, but the listed groups cover the common end products observed across decomposition pathways.