1.

Which materials are hard to remove from the polluted water?(a) Sand(b) Plastic(c) Solids(d) Dissolved saltsThe question was posed to me in an internship interview.My question is from Environmental Issues topic in chapter Environmental Issues of Biology – Class 12

Answer»

The correct answer is (d) Dissolved salts

The explanation is: The smaller SIZED dissolved MATERIALS are hard to remove from domestic SEWAGE water as they can pass through the filters easily. They contain nutrients such as AMMONIA, calcium, NITRATE, phosphate, and sodium.



Discussion

No Comment Found

Related InterviewSolutions