NEET 2006 Biology question

Not in NEET syllabus

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is -

(1)< 3.0 ppm
(2)<10 ppm
(3)< 100 ppm
(4)< 30 ppmCorrect

Answer: (4)

Solution

BOD (biochemical oxygen demand) is the amount of oxygen needed by microbes to oxidise the biodegradable organic matter in water. According to the standards of the Central Pollution Control Board, the BOD of treated waste waters discharged into natural

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Question ID VK-089713