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

7th Class Science Sample Paper Science Olympiad Model Test Paper-6

  • question_answer
    Exhaled air contains ______of carbon dioxide.

    A) 21%     

    B) 4.4%

    C) 50%

    D) 6.2%

    E) None of these

    Correct Answer: B

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