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    Question

    Which of the following preservatives is most effective

    for retaining the color of beverages?
    A Sodium benzoate Correct Answer Incorrect Answer
    B Potassium metabisulfite (KMS) Correct Answer Incorrect Answer
    C Acetic acid Correct Answer Incorrect Answer
    D Citric acid Correct Answer Incorrect Answer
    E Alcohol Correct Answer Incorrect Answer

    Solution

    • Sodium Benzoate 
      • It acts as an antioxidant and a reducing agent, preventing oxidation reactions that can cause color changes in beverages.
      • It is particularly effective in acidic environments, making it suitable for many beverages like juices and wines.
      • It inhibits the growth of microorganisms, which can also degrade color.
    • Potassium Metabisulfite (KMS) :
      • Primarily used as an antimicrobial agent but not as effective in color retention.
      • Works best at a low pH but does not directly prevent oxidation of color compounds.

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