6th Class Science Sample Paper Science Olympiad Model Test Paper-20

  • question_answer
    In which one of the following reversible change of expansion is used?

    A) Sawing of log of wood.

    B) Fixing of iron blade of a digging tool (like a spade) to a wooden handle.

    C) Rusting of iron.

    D) Burning of coal to form carbon dioxide.

    E) None of these

    Correct Answer: B


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