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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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