2. Sample Papers
  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Olympiad Model Test Paper-7

  • question_answer
    In which one of the following changes two substances react chemically?

    A) Melting of ice     

    B) Rusting of iron

    C) Boiling of alcohol

    D) Tearing of paper

    E) None of these

    Correct Answer: B

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