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    Question

    The effectiveness of many chemical preservatives depends

    primarily on the food:
    A Temperature Correct Answer Incorrect Answer
    B pH Correct Answer Incorrect Answer
    C Water content Correct Answer Incorrect Answer
    D Acidity Correct Answer Incorrect Answer

    Solution

    Preservatives (e.g., benzoic acid) are pH-dependent. Benzoate is effective at pH <4.5 (undissociated form penetrates microbes). Water content/temperature are secondary factors. 

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