| 1 |
Rapid growth of algae in water bodies in because of detergent having. |
- A. Carbonat salt
- B. Sulphonic acid
- C. Sulphat salt
- D. Phosphate salt
|
| 2 |
Fertilizers are used to make up the deficiency of; |
- A. oxygen and carbon
- B. iron and magnesium
- C. nitrogen and phosphorus
- D. hydrogen and calcium
|
| 3 |
Swimming pools are cleaned by the process. |
- A. Chlorination
- B. Hydrogenations
- C. Saponification
- D. None of them
|
| 4 |
Inland water includes. |
- A. River
- B. Lakes
- C. Streams
- D. All of them
|
| 5 |
Which one of the following diseases severe diarrhea and can be fatal? |
- A. Joundice
- B. Cholera
- C. Dysentery
- D. Typhoid
|
| 6 |
A disease is caused by excess of bile pigments in the blood is. |
- A. Typhoid
- B. Jaundice
- C. Cholera
- D. Dysentery
|
| 7 |
Neurological damage is caused by the poisoning of. |
- A. Lead
- B. Cadimium
- C. Mercury
- D. All of them
|
| 8 |
Salt makes the water permanently hard. |
- A. CaSO<sub>4</sub>
- B. Ca(HCO<sub>3</sub>)<sub>2</sub>
- C. NaHCO<sub>3</sub>
- D. NaCO<sub>3</sub>
|
| 9 |
The percentage of ocean in world water is. |
- A. 50%
- B. 67%
- C. 97%
- D. 25%
|
| 10 |
Temporary hardness is due to the presence of bicarbonates of. |
- A. Calcium
- B. Magnsium
- C. Both of them
- D. None of them
|