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

  • question_answer
    Which of the following is not a mixture?

    A) Air                              

    B) Pure water

    C) Sea water                   

    D) Lemonade

    Correct Answer: B

    Solution :

    Air is a mixture of various gases, sea water is a mixture of salts and impurities with water and lemonade is a mixture of lemon juice, sugar and water.


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