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  3. 7th Class
  4. Science
  5. Physical and Chemical Changes

7th Class Science Physical and Chemical Changes Question Bank Physical and Chemical Changes

  • question_answer
    Which of the following will be observed if an apple slice is left exposed to air?

    A) It under goes oxidation and become brown in colour

    B) Appearance of brown colour on the surface of apple slice is caused by a chemical reaction between air and enzymes

    C) Both the above are correct

    D) None of these

    Correct Answer: C

    Solution :

    Both the above are correct


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