what should be said.
Definition: Bisulphite is a type of compound that is formed when sulfuric acid reacts with hydrogen sulfide. It can be produced in natural environments, such as soil and water, or in industrial processes where it is used to produce various products like paper, plastics, and detergents. Bismuth bisulfite (BiS) is the most common form of bi-sulphur dioxide.
Definition: Metabisulphite is a type of mineral that contains sulfur, which can be used as an oxidizing agent in chemical reactions. It is composed of two sulfides, one with four sulfur atoms and the other with six sulfur atoms. This means it has a total number of 10 sulfur atoms. Metabisulphite is commonly found in various minerals such as granite and quartz, but it can also be formed from other materials, such as iron oxide and limestone.