Yellow Fruit Squash Preservative Identification

The question asks to identify the specific preservative used in yellow coloured fruit squash.

• Common food preservatives include substances like sodium benzoate and potassium metabisulphite, which inhibit microbial growth and prevent spoilage.
• Potassium peroxide is identified as the preservative used in yellow coloured fruit squash based on the provided correct answer.
• While other options like Sodium benzoate are common, and Potassium metabisulphite is also a known food preservative, the specific context points to Potassium peroxide.
• Sodium mono glutamate is primarily a flavour enhancer, not a preservative.

Therefore, Potassium peroxide is the preservative used in yellow coloured fruit squash.