1. Sulfur dioxide (SO2): This is a colorless gas with a pungent odor. It is produced when sulfur-containing fuels are burned in the presence of oxygen. Sulfur dioxide is a major air pollutant and can contribute to acid rain.
2. Sulfur trioxide (SO3): This is a colorless or white solid with a choking odor. It is produced by the oxidation of sulfur dioxide or by the direct reaction of sulfur and oxygen. Sulfur trioxide is used in the production of sulfuric acid, which is a widely used industrial chemical.
3. Sulfur monoxide (SO): This is a colorless gas with a strong unpleasant odor. It is not stable under normal conditions and readily reacts with oxygen to form sulfur dioxide.
4. Disulfur dioxide (S2O2): This is a yellow-orange gas that is produced by the reaction of sulfur and oxygen in an electric discharge. It is an unstable compound that can easily decompose into sulfur dioxide and sulfur.
