Q. No.Measuring Biochemical Oxygen Demand (BOD) is a method used for:
1. estimating the amount of organic matter in sewage water.
2. working out the efficiency of oil driven automobile engines.
3. measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale.
4. working out the efficiency of RBCs about their capacity to carry oxygen.
1. estimating the amount of organic matter in sewage water.
2. working out the efficiency of oil driven automobile engines.
3. measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale.
4. working out the efficiency of RBCs about their capacity to carry oxygen.
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The Air Prevention and Control of Pollution Act came into force in:
1. 1981
2. 1985
3. 1990
4. 1975
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Global warming can be controlled by:
| 1. | Reducing reforestation, increasing the use of fossil fuel. |
| 2. | Increasing deforestation, slowing down the growth of the human population |
| 3. | Increasing deforestation, reducing the efficiency of energy usage. |
| 4. | Reducing deforestation, cutting down the use of fossil fuel |
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A scrubber in the exhaust of a chemical industrial plant removes:
1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometer or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less
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The zone of atmosphere in which the ozone layer is found
1. Ionosphere
2. Mesosphere
3. Stratosphere
4. Troposphere
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A location with luxuriant growth of lichens on the trees indicates that the:
| 1. | Trees are very healthy | 2. | Trees are heavily infested |
| 3. | Location is highly polluted | 4. | Location is not polluted |
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Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
1. Reduced Immune System
2. Damage to eyes
3. Increased liver cancer
4. Increased skin cancer
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High value of BOD (Biochemical Oxygen Demand) indicates that:
1. water is highly polluted
2. water is less polluted
3. consumption of organic matter in the water is higher by the microbes
4. water is pure
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Rachel Carson's famous book "Silent Spring" is related to :
1. Noise pollution
2. Population explosion
3. Ecosystem management
4. Pesticide pollution
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