| 1 |
The gas use by plants to perform photosynthesis. |
- A. O<sub>2</sub>
- B. CO<sub>2</sub>
- C. N<sub>2</sub>
- D. CO
|
| 2 |
At which region all weather occurs? |
- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
|
| 3 |
At the height 880120 km from earth's surface is. |
- A. Troposphere
- B. Mesosphere
- C. Stratosphere
- D. Thermosphere
|
| 4 |
Atmosphere has regions. |
- A. One
- B. Two
- C. Three
- D. Four
|
| 5 |
The region in which ozone layere depletes is called. |
- A. Ozone hole
- B. Black hole
- C. Both of them
- D. None of them
|
| 6 |
Building and Monuments lose their beauty and shine due to |
- A. U.V radiations
- B. Chlorofluoro carbons
- C. Acid rain
- D. IR radiations.
|
| 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 one of these pollutants are not found in car exhaust fumes? |
- A. CO<sub>2</sub>
- B. O<sub>3</sub>
- C. NO<sub>2</sub>
- D. SO<sub>2</sub>
|
| 9 |
Which metal present in acid rain affect the aquatic life by clogging fish gills? |
- A. Lead
- B. Chromium
- C. Aluminium
- D. Mercury
|
| 10 |
Ozone is beneficial for us as it |
- A. Absorb infrared radiation.
- B. Absorb Ultraviolet radiations.
- C. Absorb Chlorofluorocarbons
- D. Absorb Air pollulant
|
