| Question (1):
A natural phenomenon that becomes harmful due to pollution is _____________. |
| 1. |
global warming |
| 2. |
ecological balance
|
| 3. |
greenhouse effect |
| 4. |
desertification |
|
| Ans: 3 |
|
| Question (2):
The pollutant responsible for ozone holes is ____________. |
| 1. |
CO2 |
| 2. |
SO2
|
| 3. |
CO |
| 4. |
CFC |
|
| Ans: 4 |
|
| Question (3):
One of the best solutions to get rid of non-biodegradable wastes is _________________. |
| 1. |
burning |
| 2. |
dumping
|
| 3. |
burying |
| 4. |
recycling |
|
| Ans: 4 |
|
| Question (4):
Animal dung is _________________ waste. |
| 1. |
biodegradable |
| 2. |
non-biodegradable
|
| 3. |
hazardous |
| 4. |
toxic |
|
| Ans: 1 |
|
| Question (5):
Which of the following is biodegradable? |
| 1. |
iron nails |
| 2. |
plastic mugs
|
| 3. |
leather belts |
| 4. |
silver foil |
|
| Ans: 3 |
|
| Question (6):
Which of the following is non-biodegradable? |
| 1. |
animal bones |
| 2. |
nylon
|
| 3. |
tea leaves |
| 4. |
wool |
|
| Ans: 2 |
|
| Question (7):
Name one non-biodegradable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly. |
| 1. |
DDT |
| 2. |
CFC
|
| 3. |
Radioactive substances |
| 4. |
PAN |
|
| Ans: 3 |
|
| Question (8):
In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides? |
| 1. |
small fish |
| 2. |
microscopic animals
|
| 3. |
big fish |
| 4. |
water birds |
|
| Ans: 4 |
|
| Question (9):
Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs. |
| 1. |
CFC |
| 2. |
PAN
|
| 3. |
DDT |
| 4. |
PAC |
|
| Ans: 3 |
|
| Question (10):
Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain. |
| 1. |
concentration |
| 2. |
biomagnification
|
| 3. |
expansion |
| 4. |
pollution |
|
| Ans: 2 |
|
