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5th Class Science Sample Paper Science Olympiad Model Test Paper-4

  • question_answer
    Substance X is an essential ingredient of our food. It is also essential for the conduction of nerve impulses, and is obtained by evaporating sea water. Which one of the following is the substance X?

    A) Carbon dioxide

    B) Potassium chloride

    C) Common salt

    D) Lime stone

    E) None of these

    Correct Answer: C

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