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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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