Q. No.Which one of the following statements in not valid for aerosols
1. They are harmful to human health
2. They alter rainfall and monsoon patterns
3. They cause increased agricultural productivity
4. They have negative impact on agricultural land
1. They are harmful to human health
2. They alter rainfall and monsoon patterns
3. They cause increased agricultural productivity
4. They have negative impact on agricultural land
Match the items given in Column I with those given in Column II and select the correct option given below:
|
A. |
Eutrophication |
i. |
UV-B radiation |
|
B. |
Sanitary landfill |
ii. |
Deforestation |
|
C. |
Snow blindness |
iii. |
Nutrient enrichment |
|
D. |
Jhum cultivation |
iv. |
Waste disposal |
| A | B | C | D | |
| 1. | ii | i | iii | iv |
| 2. | i | ii | iv | iii |
| 3. | iii | iv | i | ii |
| 4. | i | iii | iv | ii |
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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and releaseof molecular oxygen?
1. Carbon
2. Oxygen
3. Fe
4. CI
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Drinking mineral water with low levels ( ~ 0.02 ppm) of pesticide for long period would
1. Cause cancer of intestine
2. Pesticide accumulation in the body
3. Cause leukaemia
4. Produce immunity against mosquito
Nitrogen oxides formed during emission from automobiles and power plants are a source of fine airparticles which lead to
1. Dry acid deposition
2. Photochemical smog
3. Wet acid deposition
4. Industrial smog
Which one of the following statements pertaining to pollutant is correct?
1. DDT is nonbiodegradable pollutant
2. Excess fluoride in drinking water causes osteoporosis
3. Excess cadmium in drinking water may cause black foot disease
4. Methyl mercury in water may cause ‘’itaiitai’’ disease.
Formation of non functional methaemoglobin causes blue baby syndrome. This is due to
1. Excess of arsenic in drinking water
2. Excess of nitrate in drinking water
3. Deficiency of iron in food
4. Increased methane content in atmosphere
A lake with an inflow of domestic sewage rich in organic waste may result in:
| 1. | An increased production of fishes due to a lot of nutrients |
| 2. | Death of fishes due to lack of oxygen |
| 3. | Drying of the lake very soon due to algal bloom |
| 4. | Increased population of aquatic food web organisms |
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