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| 131. |
The particulate matter dispersed in the atmosphere is: |
| A. |
Gaseous |
B. |
Mainly gaseous |
| C. |
Non-gaseous |
D. |
Mainly non-gaseous |
Answer: Option C
Explanation:
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| 132. |
The air pollution caused by phosphate fertilizer factories is due to: |
| A. |
Phosphene |
B. |
SiF4 |
| C. |
Dust |
D. |
Halogens |
Answer: Option B
Explanation:
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| 133. |
Most harmful heavy metals causing water pollution: |
| A. |
Pb, Hg, Cr, Cd |
B. |
P,Mn,B,Mg |
| C. |
N,K,Mo |
D. |
Zn,Mo,Mg,Ag |
Answer: Option A
Explanation:
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| 134. |
The most harmful effect of ionising radiations precisely involves: |
| A. |
Cell membrances |
B. |
DNA |
| C. |
Mitochondria and ribosomes |
D. |
Nucleus |
Answer: Option B
Explanation:
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| 135. |
In human beings, anoxia is caused due to: |
Answer: Option B
Explanation:
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| 136. |
The first international conference for globalizing the environmental problems ws held at: |
| A. |
Stockholm |
B. |
Paris |
| C. |
London |
D. |
Tokyo |
Answer: Option A
Explanation:
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| 137. |
The haemoglobin has maximum affinity for the gas: |
Answer: Option D
Explanation:
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| 138. |
Which of the following is biodegradable pollutant? |
| A. |
Sewage |
B. |
Palstic |
| C. |
Polythene |
D. |
DDT |
Answer: Option A
Explanation:
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| 139. |
The extent of darkness caused due to smoke can be determined by the help of: |
| A. |
Smoke filters |
B. |
Ringelmann's charts |
| C. |
Horizontal microscopes |
D. |
All of these |
Answer: Option B
Explanation:
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| 140. |
The light of cities is reduced in comparison to villages due to the presence of: |
| A. |
SO2 and SO3 |
B. |
SO2 and oxides of nitrogen |
| C. |
Hydrocarbons and N2O |
D. |
Suspended particulate matter |
Answer: Option D
Explanation:
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