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    Question

    _____ is defined as the vapour pressure of a food

    substance to that of water at the same temperature
    A Water activity Correct Answer Incorrect Answer
    B Moisture content Correct Answer Incorrect Answer
    C Nutritional activity Correct Answer Incorrect Answer
    D Moisture activity Correct Answer Incorrect Answer

    Solution

    The water activity (aw) of a food is the ratio between the vapour pressure of the food, when in a completely undisturbed balance with the surrounding air media, and the vapour pressure of distilled water under identical conditions.

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