MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the reason for the increase in the BOD? |
| A. | Planting trees |
| B. | Collecting of sewage water |
| C. | Dumping of sewage in the water |
| D. | Cleaning of water |
| Answer» D. Cleaning of water | |
| 2. |
How much amount of dissolved oxygen does gravely polluted water consists of? |
| A. | 20 ppm |
| B. | 8 ppm |
| C. | Above 4 ppm |
| D. | Below 4 ppm |
| Answer» E. | |
| 3. |
What amount of BOD indicates low water pollution? |
| A. | 4000mg/liter |
| B. | 1500mg/liter |
| C. | 2000mg/liter |
| D. | 15000mg/liter |
| Answer» C. 2000mg/liter | |
| 4. |
What amount of BOD indicates high water pollution? |
| A. | 4000mg/liter |
| B. | 400mg/liter |
| C. | 40mg/liter |
| D. | 4mg/liter |
| Answer» B. 400mg/liter | |
| 5. |
What should be the amount of BOD in the drinking water? |
| A. | More than 1 ppm |
| B. | Less than 1 ppm |
| C. | 5 ppm |
| D. | 10 ppm |
| Answer» C. 5 ppm | |