Q.What do you mean by BOD and COD?

Among the options, citric acid is the food additive used as an antioxidant.

Antioxidants are food additives that prevent oxidation of food (they retard the development of rancidity in fats and oils). Citric acid is widely used for this purpose, acting as an antioxidant and metal-chelating synergist that slows oxidative spoilage. Of the other options, sodium nitrite …

Lecithin, citric acid and vitamin E are all used as antioxidants — option (D).

Antioxidants are added to food to prevent rancidity by retarding oxidation of fats and oils. All three listed substances function as antioxidants:

• Vitamin E (tocopherol) is a natural fat-soluble antioxidant.
• Lecithin acts as an antioxidant (and emulsifier) in fatty foods. …

Sodium benzoate is a widely used chemical food preservative.

Food preservatives are chemical substances added to food to prevent its spoilage due to microbial growth. Sodium benzoate is one of the most common food preservatives; it is used in small, permitted concentrations (metabolised readily by the body) to inhibit the growth of b …

Antipyretic drugs bring down elevated body temperature (fever).

Antipyretics are medicinal compounds used to reduce fever, i.e. to bring an abnormally elevated body temperature back to normal. They work by inhibiting the biosynthesis of prostaglandins that raise the body's temperature 'set point' in the hypothalam …

Saccharin is a common artificial (non-nutritive) sweetener, hundreds of times sweeter than sucrose.

Artificial sweetening agents are synthetic chemical compounds that taste sweet but provide little or no calorific/nutritive value, and are used as sugar substitutes (especially for diabetics and in weight control).

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