1.

The organic matter have the limit in water that is about __________(a) 0.2 to 1(b) 0.5 to 1(c) 1 to 2(d) 2 to 4The question was posed to me during an interview for a job.Question is taken from Reverse Osmosis, Ultrafilteration, COD and BOD topic in portion Water of Applied Chemistry

Answer»

Correct answer is (a) 0.2 to 1

To ELABORATE: The organic matter has the desired limit in WATER about 0.2 to 1 ppm. INCREASE in the value indicates the POLLUTION.



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