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

6th Class Science Sample Paper Science Olympiad Model Test Paper-2

  • question_answer
    A substance X changes to Y when it is heated. But when the substance Y is cools down, it again changes to X. This type of change is known as:

    A) Reversible change

    B) Irreversible change

    C) Periodic change

    D) All of these

    E) None of these

    Correct Answer: A

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