| 1 |
Almost all air crafts fly in which reion? |
- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
|
| 2 |
The green house effect is proportional to the amount of which gas in air. |
- A. CO<sub>2</sub>
- B. O<sub>2</sub>
- C. N<sub>2</sub>
- D. All of them
|
| 3 |
The gas used by animals to perform respiration. |
- A. O<sub>2</sub>
- B. N<sub>2</sub>
- C. SO<sub>2</sub>
- D. Cl<sub>2</sub>
|
| 4 |
The percentage of SO<sub>2 </sub>released by the combustion of coal and petroleum product. |
- A. 40%
- B. 60%
- C. 70%
- D. 80%
|
| 5 |
Which gas acts as a glass wall of a green house? |
- A. Oxygen
- B. Carbon dioxides
- C. sulphur dioxide
- D. Hydrogen
|
| 6 |
About 99% atmosphere's lies within: |
- A. 30 kilometre
- B. 35 kilometre
- C. 15kilometre
- D. 11 kilometre
|
| 7 |
pH of acid rain is: |
- A. 7-5
- B. 6-7
- C. 1-2
- D. 4-5
|
| 8 |
The pH of water containing CO<sub>2</sub> is |
- A. 4-6
- B. 5.6-6
- C. 6-7
- D. 7-8
|
| 9 |
A pollutant is a waste material that pollutes. |
- A. Air
- B. Water
- C. Soil
- D. All of them
|
| 10 |
Which one of the following is not air pollutants? |
- A. N<sub>2</sub>
- B. CO
- C. NO<sub>2</sub>
- D. O<sub>2</sub>
|
