Question

# Potassium metabisulphite is a:(a).Preservative(b).Antioxidant(c).Artificial sweetener(d).Both (a) and (b)

Hint: Potassium metabisulfite, ${{K}_{2}}{{S}_{2}}{{O}_{5}}$, otherwise called potassium pyrosulfate, is a white glasslike powder with a sharp smell. It is mostly utilized as a cell reinforcement or substance sterilant. As a disulfate, it is artificially fundamentally the same as sodium metabisulfite, with which it is once in a while utilized conversely.