The gas produced during decomposition of matter is
Answer Details
The gas produced during decomposition of matter is not chlorine or oxygen, as they are not usually produced during the process. Carbon monoxide may be produced in some cases, but it is not the main gas. The correct answer is hydrogen sulphide. When organic matter decomposes, bacteria break down the compounds and release various gases, including hydrogen sulphide. This gas has a characteristic rotten egg smell and can be toxic in high concentrations.