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

  • question_answer
    Why rusting of iron is a chemical change?

    A) Because it changes its colour

    B) Because it makes iron powdery

    C) Because a new substance is formed

    D) None of these

    Correct Answer: C

    Solution :

    Rust (Iron oxide) is a new substance formed that has properties different from both iron and oxygen.


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