Water Pollution MCQ (Multiple Choice Questions) PDF - 38

MCQ 186: Phosphorous, is needed for the

1. Growth
2. Decomposition
3. Photosynthesis
4. Eutrophication

MCQ 187: Primary treatment reduces the bacterial load, ranges from

1. 30-80%
2. 20-75%
3. 10-60%
4. 90-100%

MCQ 188: Cyanides are toxic to all biological life, prevents enzyme action, as well as immobilize the

1. Lungs
2. Skin
3. Nervous System
4. Heart

MCQ 189: One molecule of CFCs contain 15000 molecules of

1. CO₂
2. CO
3. HCFCs
4. CH4

MCQ 190: The biotic community along with its physical factors is known as

1. Ecosystem
2. Biosphere
3. Hydrosphere
4. Biome