2. Sample Papers
  3. 6th Class
  4. Science

6th Class Science Sample Paper Science Olympiad Model Test Paper-18

  • question_answer
    Which one of the following is an example of irreversible change?

    A)  Melting of wax  

    B) Stretching of a rubber band

    C) Melting of coal tar

    D) Ripening of fruits

    E) None of these

    Correct Answer: D

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