Water Pollution Multiple Choice Questions (MCQ) PDF Download

MCQ 1: The BOD, which is not oxidized biologically is known as

1. Biologically Degradable
2. Biologically Inactive
3. Biologically Active
4. Bioactive

MCQ 2: Secondary treatment is also known as

1. Biological Treatment
2. Preliminary Treatment
3. Secondary Treatment
4. Tertiary Treatment

MCQ 3: What is important to support marine animals in water bodies?

1. Dissolved Oxygen
2. Nitrogen
3. CO
4. CO₂

MCQ 4: The presence of hydrogen sulphide indicates anaerobic

1. Decomposition
2. Eutrophication
3. Degradation
4. Biodegradation

MCQ 5: In higher temperature, the D.O concentration of water molecules is, comparatively

1. High
2. Low
3. Medium
4. Very High