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    Question

    Which of the following is NOT a physical

    change?
    A Liquefaction of gases to liquids Correct Answer Incorrect Answer
    B Fermentation of substances Correct Answer Incorrect Answer
    C Vaporisation of liquids to gases Correct Answer Incorrect Answer
    D Melting of solids to liquids Correct Answer Incorrect Answer

    Solution

    The fermentation of substances is NOT a physical change; it is a chemical change. The other processes (liquefaction, vaporization, and melting) are physical changes.

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