2. Sample Papers
  3. 10th Class
  4. Science

10th Class Science Sample Paper Science Olympiad Model Test Paper-3

  • question_answer
    Which one of the following pH level of river water indicates that the water in river is polluted?

    A) 8

    B) 9

    C) 4

    D) 7

    E) None of these

    Correct Answer: C

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