MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 do BOD and COD stand for? |
| A. | Biological Oxygen Demand and Chemical Oxygen Demand respectively |
| B. | Chemical Oxygen Demand and Biological Oxygen Demand respectively |
| C. | Botanical Oxygen Demand and Chemical Oxygen Demand respectively |
| D. | Basic Oxygen Demand and Chemical Oxygen Demand respectively |
| Answer» B. Chemical Oxygen Demand and Biological Oxygen Demand respectively | |
| 2. |
Which of the following is the effect of high BOD? |
| A. | More birth of aquatic plants |
| B. | More birth of fishes |
| C. | Higher dissolved oxygen |
| D. | Lower dissolved oxygen |
| Answer» E. | |
| 3. |
What is the excess growth of plankton in water due to the presence of nutrients called? |
| A. | Fungal bloom |
| B. | Algal bloom |
| C. | Plantae bloom |
| D. | Animal bloom |
| Answer» C. Plantae bloom | |
| 4. |
What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes? |
| A. | Natality of aquatic plants |
| B. | Natality of aquatic fishes |
| C. | Mortality of aquatic creatures |
| D. | Mortality of bacteria |
| Answer» D. Mortality of bacteria | |
| 5. |
Who utilizes the maximum amount of oxygen in the upstream of sewage discharge? |
| A. | Animals |
| B. | Microorganisms |
| C. | Humans |
| D. | Plants |
| Answer» C. Humans | |
| 6. |
How is the amount of biodegradable organic matter in sewage water estimated? |
| A. | Chemical Oxygen Demand |
| B. | Physical Oxygen Demand |
| C. | Biological Oxygen Demand |
| D. | Mathematical Oxygen Demand |
| Answer» D. Mathematical Oxygen Demand | |
| 7. |
Who is responsible for the degradation of biodegradable organic matter present in the domestic sewage? |
| A. | Animals |
| B. | Humans |
| C. | Plastic |
| D. | Bacteria and other microbes |
| Answer» E. | |
| 8. |
Which sewage contains biodegradable waste such as organic matter? |
| A. | Medical waste |
| B. | Plastic waste |
| C. | Domestic waste |
| D. | Wild waste |
| Answer» D. Wild waste | |
| 9. |
Which materials are hard to remove from the polluted water? |
| A. | Sand |
| B. | Plastic |
| C. | Solids |
| D. | Dissolved salts |
| Answer» E. | |
| 10. |
Which materials are easily removed from the polluted water? |
| A. | Liquid |
| B. | Solids |
| C. | Dissolved |
| D. | Nutrients |
| Answer» C. Dissolved | |
| 11. |
Which of the following are the dissolved materials present in domestic sewage? |
| A. | Sand |
| B. | Clay |
| C. | Nutrients |
| D. | Bacteria |
| Answer» D. Bacteria | |
| 12. |
Which of the following are the colloidal materials present in domestic sewage? |
| A. | Calcium |
| B. | Sand |
| C. | Ammonia |
| D. | Fecal matter |
| Answer» E. | |
| 13. |
Which of the following are the suspended solids in the domestic sewage? |
| A. | Ammonia |
| B. | Sand |
| C. | Calcium |
| D. | Bacteria |
| Answer» C. Calcium | |
| 14. |
How much percent of impurities are enough to make domestic sewage unfit for humans? |
| A. | 0.1 percent |
| B. | 1 percent |
| C. | 5 percent |
| D. | 10 percent |
| Answer» B. 1 percent | |
| 15. |
When the government of India did pass the Water (Prevention and Control of Pollution) Act? |
| A. | 1999 |
| B. | 1974 |
| C. | 1896 |
| D. | 2010 |
| Answer» C. 1896 | |