| 1 |
Ultraviolet radiations can causes. |
- A. Hepatitis
- B. Asthma
- C. Skin cancer
- D. Night blindness
|
| 2 |
ozone depletion (i.e O3--------------> O2 + O) occurs in: |
- A. lower stratosphere
- B. middle stratosphere
- C. upper stratosphere
- D. troposphere
|
| 3 |
Which pollutant is responsible for changing weather? |
- A. Air pollutant
- B. Water pollutant
- C. Soil pollutant
- D. All of them
|
| 4 |
The percentage by volume of nitrogen in dry gas is. |
- A. 78.09%
- B. 20.94%
- C. 0.93%
- D. 0.03%
|
| 5 |
Acid rain damages the building it is due to reaction on. |
- A. Calcium sulphate
- B. Calcium nitrate
- C. Calcium carbonate
- D. Calcium oxilat
|
| 6 |
How much amount of sunlight reaches up to earth and absorbed: |
- A. 26%
- B. 32%
- C. 50%
- D. 18%
|
| 7 |
The stratosphere layer is at height above the earth's surface. |
- A. 0-12 km
- B. 12-50 km
- C. 50-85 km
- D. 65-120 km
|
| 8 |
Which is not an air pollutant? |
- A. CO<sub>2</sub>
- B. CO
- C. SO<sub>2</sub>
- D. NH<sub>3</sub>
|
| 9 |
Almost all air crafts fly in which reion? |
- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
|
| 10 |
The major constituents of troposphere are: |
- A. carbon dioxide and argon
- B. nitrogen and oxygen
- C. argon and oxygen
- D. carbon dioxide and oxygen
|
