Question

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 4

The 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 1

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.