MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The dosage of ozone for municipal water treatment is __________ |
| A. | 0.5 ppm |
| B. | 1ppm |
| C. | 1.5 ppm |
| D. | 2ppm |
| Answer» D. 2ppm | |
| 2. |
Which of the following is most effective in the killing of bacteria present in water? |
| A. | Nascent oxygen |
| B. | Chlorine |
| C. | HOBr |
| D. | I2 |
| Answer» B. Chlorine | |
| 3. |
What happens during the breakdown of ozone? |
| A. | CO2 is formed |
| B. | Nascent oxygen is formed |
| C. | CO2 and Nascent oxygen is formed |
| D. | Formation of oxygen and water takes place. |
| Answer» C. CO2 and Nascent oxygen is formed | |
| 4. |
The ozone generators can convert ____ % of feed oxygen into ozone. |
| A. | 1 |
| B. | 5 |
| C. | 1-4 |
| D. | 10 |
| Answer» D. 10 | |
| 5. |
Ozone is a _______ allotrope of oxygen. |
| A. | Monoatomic |
| B. | Diatomic |
| C. | Triatomic |
| D. | Polyatomic |
| Answer» D. Polyatomic | |
| 6. |
Iodine is a better disinfectant to kill virus than hypoiodous acid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
a HIO + b OH- <=> HIO3 + b H2O + b I–. What are the values of a and b respectively in the above equation? |
| A. | 1, 2 |
| B. | 1, 3 |
| C. | 3, 2 |
| D. | 3, 1 |
| Answer» D. 3, 1 | |
| 8. |
The chemical formula of iodate is __________ |
| A. | HIO3 |
| B. | HIO |
| C. | HIO2 |
| D. | H2IO2 |
| Answer» B. HIO | |
| 9. |
The chemical formula of hypoiodous acid is __________ |
| A. | H2IO |
| B. | H2I |
| C. | HIO |
| D. | HI2 |
| Answer» D. HI2 | |
| 10. |
THE_OZONE_GENERATORS_CAN_CONVERT______%_OF_FEED_OXYGEN_INTO_OZONE.?$ |
| A. | 1 |
| B. | 5 |
| C. | 1-4 |
| D. | 10 |
| Answer» D. 10 | |
| 11. |
Which of the following is most effective in the killing of bacteria present in water?$ |
| A. | Nascent oxygen |
| B. | Chlorine |
| C. | HOBr |
| D. | I2 |
| Answer» B. Chlorine | |
| 12. |
What_happens_during_the_breakdown_of_ozone?$ |
| A. | CO<sub>2</sub> is formed |
| B. | Nascent oxygen is formed |
| C. | CO<sub>2</sub> and Nascent oxygen is formed |
| D. | Formation of oxygen and water takes place. |
| Answer» C. CO<sub>2</sub> and Nascent oxygen is formed | |
| 13. |
The dosage of ozone for municipal water treatment is |
| A. | 0.5 ppm |
| B. | 1ppm |
| C. | 1.5 ppm |
| D. | 2ppm |
| Answer» D. 2ppm | |
| 14. |
The water is free from oxidizable materials. What is the dosage of ozone required? |
| A. | 0.01ppm |
| B. | 0.1-0.2ppm |
| C. | 0.2-0.3ppm |
| D. | 0.4-0.5ppm |
| Answer» D. 0.4-0.5ppm | |
| 15. |
Ozone is a _______ allotrope of oxygen? |
| A. | Monoatomic |
| B. | Diatomic |
| C. | Triatomic |
| D. | Polyatomic |
| Answer» D. Polyatomic | |
| 16. |
What happen to the concentration of iodine when the pH is between 6 and 8? |
| A. | I2 decreases whereas HIO increases |
| B. | I2 increases, whereas HIO decreases |
| C. | Both I2 and HIO increases |
| D. | Both I2 and HIO decreases |
| Answer» B. I2 increases, whereas HIO decreases | |
| 17. |
a HIO + b OH- <=> HIO3 + b H2O + b I–. What are the values of a and b respectively in the above equation?$ |
| A. | 1, 2 |
| B. | 1, 3 |
| C. | 3, 2 |
| D. | 3, 1 |
| Answer» D. 3, 1 | |
| 18. |
The chemical formula of iodate is |
| A. | HIO<sub>3</sub> |
| B. | HIO |
| C. | HIO<sub>2</sub> |
| D. | H<sub>2</sub>IO<sub>2</sub> |
| Answer» B. HIO | |
| 19. |
What happens to the hypoiodous acid when the pH is over 8? |
| A. | HIO is stable |
| B. | Formation of hypoiodite ion takes place |
| C. | Formation of iodine and hypoiodite ion takes place |
| D. | Formation of iodine and iodate takes place |
| Answer» E. | |
| 20. |
At what pH, the dissociation of hypoiodous acid takes place? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 21. |
The chemical formula of hypoiodous acid is |
| A. | H<sub>2</sub>IO |
| B. | H<sub>2</sub>I |
| C. | HIO |
| D. | HI<sub>2</sub> |
| Answer» D. HI<sub>2</sub> | |