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

  • question_answer
    Surface of a reactive metal may be attacked by air, water or other substances causing corrosion. Corrosion of iron is called rusting. The product formed by rusting is:

    A) rust                             

    B) a brown solid

    C) Both of these    

    D) None of these

    Correct Answer: C

    Solution :

    The brown product is called rust. It is an oxide of iron.           


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