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

  • question_answer
    Which of the following statements is correct?

    A) Iron and rust are same substance.

    B) Rusting of iron is a chemical change.

    C) Removal of rust from surface of iron is chemical change.

    D) All of the above

    Correct Answer: B

    Solution :

    Properties of rust is different from iron.


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