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    Question

    Which of the following is a physical

    change?
    A Formation of curd Correct Answer Incorrect Answer
    B Burning of a candle Correct Answer Incorrect Answer
    C Rusting of an iron rod Correct Answer Incorrect Answer
    D Heating of copper wire by electricity Correct Answer Incorrect Answer

    Solution

    Heating copper wire by electricity is a physical change as it involves only a change in temperature, not the composition. Other options are chemical changes, where new substances are formed.

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