Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Engineering Solid Waste Management
Which of the following statements is/are correct with respect to dye wastes?
1
COD : BOD ratio is very low.
2
COD : BOD ratio is very high.
3
COD : BOD ratio is very high; and dye wastes not only come from dyes but also from the chemicals used in manufacturing industry.
4
Dye wastes not only come from dyes but also from the chemicals used in manufacturing industry.