Question

Waste water contains which of the following kinds of impurities?

• A. Dissolved impurities
• B. Undissolved impurities
• C. Non – biodegradable impurities
• D. All of the above

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

Dissolved impurities

B

Undissolved impurities

C

Non – biodegradable impurities

D

All of the above

Waste water contains dissolved impurities (such as mercury and lead salts), undissolved impurities (such as faecal matter) as well as non-biodegradable impurities (such as plastics).