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

  • question_answer
    Two changes are stated below: (i) A piece of magnesium gives of bright flames when burnt. (ii) A piece of iron glows red when heated strongly. Which of the above changes is a physical change?

    A)  i only             

    B)  ii only

    C) Both i and ii                

    D) neither i nor ii

    Correct Answer: B

    Solution :

    No new substances are formed.


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