Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Biology Ecology and Environment Environment
Which of the following is NOT present in waste water from industries?
1
Neither heavy metals nor organic compounds
2
Both heavy metals and organic compounds
3
Organic compounds
4
More than one of the above
5
None of the above