Q. No.What would be true for acid rain?
1.
Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.
2.
The pH of acid rain is most commonly below 4.
3.
Acid rain has direct significant effects on human health.
4.
Both the higher pH and lower aluminium concentrations in surface water that occur as a result of acid rain can cause damage to fish and other aquatic animals.
Catalytic converters can also contribute to environmental pollution by increasing the emission of:
| 1. | Methane | 2. | Hydrogen cyanide |
| 3. | Particulate matter | 4. | Carbon dioxide |
Which of the following are commonly used as a bacterial indicator of water pollution?
| 1. | Coliforms | 2. | Shigella |
| 3. | Giardia | 4. | Salmonella |
Eutrophication of lakes would lead to:
1. Decreased biomass of phytoplankton
2. Increased dissolved oxygen levels in water
3. Decreased biodiversity
4. Increase in the aesthetic value of the lake
Identify the incorrect statement regarding the ecological impact of DDT:
| 1. | It is a persistent organic pollutant. |
| 2. | As it is lipophilic, it bioaccumulates especially in predatory birds. |
| 3. | It can be metabolized to non-toxic forms by human beings. |
| 4. | It causes eggshell thinning in predatory birds. |
To be regarded as a sanitary landfill site, all the following conditions must be fulfilled except:
1. Full or partial hydrogeological isolation
2. Refuge should be kept in an open-burning dump
3. Permanent control
4. Planned waste emplacement and covering
Polyblend is:
| 1. | environment-friendly way of disposing of solid wastes |
| 2. | replacement of CFCs in the refrigeration industry |
| 3. | an innovative way of sealing the radioactive wastes |
| 4. | a product that has the potential to effectively deal with plastic wastes |
The accidental leakage of radioactive wastes occurred in the “Three Mile Island” and “Chernobyl” respectively in:
| 1. | 1979 and 1986 | 2. | 1981 and 1988 |
| 3. | 1985 and 1991 | 4. | 1987 and 1999 |
The environmental effects of global warming include all the following except:
| 1. | Arctic sea ice decline, sea level rise, retreat of glaciers |
| 2. | Extreme weather, extreme events, tropical cyclones |
| 3. | Ocean oxygenation and increased alkalinity of ocean waters |
| 4. | Runaway and abrupt climate change |
The common misconceptions regarding ozone depletion include:
| I. | Since CFC molecules are heavier than air (nitrogen or oxygen), the CFC molecules cannot reach the stratosphere in a significant amount. |
| II. | Natural sources of tropospheric chlorine are four to five times larger than man-made ones and are responsible for ozone depletion. |
| III. | The ozone hole should be above the sources of CFCs. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II, and III |
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