Chemical formula of potassium metabisulphite is

A. KMS

B. K₂S₂O₅

C. K₂SO₂

D. KSO₂

Answer: Option B

Solution(By Examveda Team)

Potassium metabisulphite is also known as potassium pyrosulphite, it is a white crystalline powder with the chemical formula K₂S₂O₅.
It can be prepared by treating a solution of potassium hydroxide with sulphur dioxide.
It is mainly used as an antioxidant or chemical sterilant, a food additive