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NEET Biology question

BiologyEnvironmental IssuesNEET

Not in NEET syllabus

Arrange the following options in ascending order of their BOD value.

I. Sample of highly polluted pond water

II. Sample from unpolluted pond water

III. Distilled water **[Guj CET 2008]**

Answer: (C)

Solution

Distilled water contains no organic matter and has essentially zero BOD, unpolluted pond water has a low but non-zero BOD from natural organic content, and highly polluted pond

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Question ID VK-130001