| 1 |
The envelope of different gases around the earth is called. |
- A. Atmosphere
- B. Brosphere
- C. Lithosphere
- D. Hydrosphere
|
| 2 |
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>
|
| 3 |
Higher concentration of CO causes. |
- A. Fatique
- B. Headache
- C. Both of them
- D. None of them
|
| 4 |
Which gas is responsible in warming the atmosphere? |
- A. Nitrogen
- B. Hydrogen
- C. Helium
- D. Fluorine
|
| 5 |
A strange bitter smell noticed near photo copier machine is of. |
- A. H<sub>2</sub>S
- B. SO<sub>2</sub>
- C. O<sub>2</sub>
- D. O<sub>3</sub>
|
| 6 |
Which gas protects the Earth's surface from ultraviolet radiations? |
- A. CO<sub>2</sub>
- B. CO
- C. N<sub>2</sub>
- D. O<sub>3</sub>
|
| 7 |
The Earth's atmosphere is getting hotter because of. |
- A. Increasing concentration of CO
- B. Increasing concentration of CO<sub>2</sub>
- C. Increasing concentration of O<sub>3</sub>
- D. Increasing concentration of SO<sub>2</sub>
|
| 8 |
The region of ozone decomposition in stratosphere is. |
- A. 20 km
- B. 30 km
- C. 40 km
- D. 50 km
|
| 9 |
Percentage of nitrogen in atmosphere is: |
- A. 20.94%
- B. 78.09%
- C. 0.93%
- D. 0.03%
|
| 10 |
Global warming is because of. |
- A. Absorption of infrared radiation emitted by earth surface.
- B. Absorption of infrared radiation coming from sun.
- C. Absorption of infrared Ultraviolet coming from the sun.
- D. Emission of ultraviolet radiation from the earth's surface.
|
