Which chemical compound is used as a food preservative in some sauces and syrups to maintain their natural color and protect against bacteria?

Correct option is A

The correct answer is (a) Potassium meta bisulfite.
Potassium meta bisulfite (K2S2O5) is widely used as a food preservative and antioxidant in various foods and beverages. It releases sulfur dioxide (SO2), which is effective in preventing microbial growth and preserving color in food products. This is particularly valuable in sauces and syrups where color preservation and protection against spoilage are crucial.
Applications: It is specifically used in sauces and syrups to prevent oxidation, which can lead to color changes and spoilage. It also inhibits the growth of bacteria, molds, and yeasts.
Monosodium Glutamate (MSG):
 Chemical Nature and Use: Monosodium glutamate (C5H8NO4Na) is a flavor enhancer that is commonly added to foods to enhance their savory taste. It is not used as a preservative or for protecting food color or against bacteria.
 
Dihydroxy Benzene (Hydroquinone):
 Chemical Nature and Use: Hydroquinone (C6H4(OH)2) is an organic compound that is not used in food preservation. It is primarily used in photographic development and as a reducing agent in industrial applications. Its safety profile does not support its use in food items.
Hydrazine Hydrate:
 Chemical Nature and Use: Hydrazine hydrate (N2H4·H2O) is a highly reactive and toxic compound primarily used in industrial and chemical synthesis applications, such as rocket fuels and pharmaceuticals. It is not suitable or approved for use in food products due to its toxicity and potential health risks.