In order to prevent the spoilage of potato chips, they are packed in plastic bags in an atmosphere of :

48 The chemical reaction involved in the corrosion of iron metal is that of : 49 The term used to indicate the development of unpleasant smell and taste in fat and oil containing foods due to aerial oxidation is: 51 A white precipitate can be obtained by adding dilute sulphuric acid to: 52 A white precipitate will be formed if we add common salt solution to: