| 1 |
Iron and steel structure are damaged by. |
- A. Carbon monoxide
- B. Sulphur dioxide
- C. Methane
- D. Carbon dioxide
|
| 2 |
Normally rain water is weakly acidic because of. |
- A. SO<sub>3</sub> gas.
- B. CO<sub>2</sub>gas.
- C. SO<sub>2</sub>gas.
- D. NO<sub>2</sub>gas.
|
| 3 |
ozone depletion (i.e O3--------------> O2 + O) occurs in: |
- A. lower stratosphere
- B. middle stratosphere
- C. upper stratosphere
- D. troposphere
|
| 4 |
PAN stands for |
- A. Poly aniline nitrate
- B. Proxy acetyl nitrate
- C. Poly acetyl nitrite
- D. Proxy acetyl nitrite
|
| 5 |
The earth atmosphere is getting hotter because of : |
- A. SO<sub>2</sub>
- B. O<sub>3</sub>
- C. CO<sub>2</sub>
- D. CO
|
| 6 |
The region in which ozone layere depletes is called. |
- A. Ozone hole
- B. Black hole
- C. Both of them
- D. None of them
|
| 7 |
Incinerator reduces solid waste into . |
- A. Ash
- B. Flue gas
- C. Heat
- D. All of them
|
| 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 |
Building are being damaged by acid rain because it attacks. |
- A. Calcium sulphate
- B. Calcium nitrate
- C. Calcium carbonate
- D. Calcium oxalate
|
| 10 |
Ozone layer is not found is |
- A. Upper stratosphere
- B. Mid stratosphere
- C. Lower stratosphere
- D. All of them
|
