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      Question

      The critical limit for NO3-N (mg/litre) in drinking

      water as per WHO standard is:
      A 5 Correct Answer Incorrect Answer
      B 10 Correct Answer Incorrect Answer
      C 15 Correct Answer Incorrect Answer
      D 20 Correct Answer Incorrect Answer

      Solution

      As per WHO standard, the critical limit for NO3-N (mg/litre) in drinking water is 10mg/l.

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