All questions of Environmental Issues for Computer Science Engineering (CSE) Exam
National forest Policy 1988 for the B % of plains and A % of hills here A and B- a)67 and 33
- b)54 and 46
- c)33 and 67
- d)84 and 16
Correct answer is option 'A'. Can you explain this answer?
National forest Policy 1988 for the B % of plains and A % of hills here A and B
a)
67 and 33
b)
54 and 46
c)
33 and 67
d)
84 and 16
 | Dev Patel answered |
National forest policy (1988) of India recommended 33% forest for plains and 67% for hills
Environment protection act passed in the year- a)1986
- b)1985
- c)1987
- d)1996
Correct answer is option 'A'. Can you explain this answer?
Environment protection act passed in the year
a)
1986
b)
1985
c)
1987
d)
1996
| | Rahul answered |
The Environment Protection Act (EPA) was enacted in 1986 with the objective of providing the protection and improvement of the environment.
The scientific view is that the increase in global temperature should not exceed 2°C above pre-industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world?
1) Terrestrial biosphere tends toward a net carbon source.
2) Widespread coral mortality will occur.
3) All the global wetlands will permanently disappear.
4) Cultivation of cereals will not be possible anywhere in the world.
Select the correct answer using the code given below- a)1 only
- b)1 and 2 only
- c)2, 3 and 4 only
- d)1,2,3 and 4
Correct answer is option 'B'. Can you explain this answer?
The scientific view is that the increase in global temperature should not exceed 2°C above pre-industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world?
1) Terrestrial biosphere tends toward a net carbon source.
2) Widespread coral mortality will occur.
3) All the global wetlands will permanently disappear.
4) Cultivation of cereals will not be possible anywhere in the world.
Select the correct answer using the code given below
1) Terrestrial biosphere tends toward a net carbon source.
2) Widespread coral mortality will occur.
3) All the global wetlands will permanently disappear.
4) Cultivation of cereals will not be possible anywhere in the world.
Select the correct answer using the code given below
a)
1 only
b)
1 and 2 only
c)
2, 3 and 4 only
d)
1,2,3 and 4
 | Siddharth Dasgupta answered |
The scientific view is that the increase in global temperature should not exceed 2 degrees Celsius above pre-industrial levels. This threshold, often referred to as the "2-degree target," has been widely accepted by the international community as a critical limit to avoid catastrophic consequences of climate change.
The target was initially proposed by the scientific community and gained significant attention after being endorsed by the United Nations Framework Convention on Climate Change (UNFCCC) in 2010. It was later reaffirmed in the Paris Agreement, signed by nearly all countries in 2015.
Exceeding the 2-degree limit could lead to severe impacts, including more frequent and intense heatwaves, extreme weather events, sea-level rise, biodiversity loss, and disruptions to ecosystems and human societies. It is crucial to limit global warming within this threshold to minimize these risks and safeguard the well-being of both present and future generations.
Efforts to combat climate change focus on reducing greenhouse gas emissions, transitioning to renewable energy sources, promoting energy efficiency, and adopting sustainable practices in various sectors. These actions aim to mitigate the causes of global warming and limit temperature increase to a manageable level.
The target was initially proposed by the scientific community and gained significant attention after being endorsed by the United Nations Framework Convention on Climate Change (UNFCCC) in 2010. It was later reaffirmed in the Paris Agreement, signed by nearly all countries in 2015.
Exceeding the 2-degree limit could lead to severe impacts, including more frequent and intense heatwaves, extreme weather events, sea-level rise, biodiversity loss, and disruptions to ecosystems and human societies. It is crucial to limit global warming within this threshold to minimize these risks and safeguard the well-being of both present and future generations.
Efforts to combat climate change focus on reducing greenhouse gas emissions, transitioning to renewable energy sources, promoting energy efficiency, and adopting sustainable practices in various sectors. These actions aim to mitigate the causes of global warming and limit temperature increase to a manageable level.
The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?- a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons
- b)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons
- c)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.
- d)Increased temperature at polar region due to global warming
Correct answer is option 'B'. Can you explain this answer?
The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?
a)
Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons
b)
Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons
c)
Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.
d)
Increased temperature at polar region due to global warming
 | Amit Kumar answered |
Explanation: In 1980s atmospheric scientists working in Antarctica reported about depletion of ozone layer commonly known as ozone hole over the South Pole. It was found that a unique set of conditions was responsible for the ozone hole. In summer season, nitrogen dioxide and methane react with chlorine monoxide (reaction iv) and chlorine atoms (reaction v) forming chlorine sinks, preventing much ozone depletion, whereas in winter, special type of clouds called polar stratospheric clouds are formed over Antarctica. These polar stratospheric clouds provide surface on which chlorine nitrate formed (reaction iv) gets hydrolysed to form hypochlorous acid (reaction (vi)). It also reacts with hydrogen chloride produced as per reaction (v) to give molecular chlorine.
When sunlight returns to Antarctica in the spring, the sun’s warmth breaks up the clouds and HOCl and Cl2 are photolysed by sunlight, as given in reactions (viii) and (ix). The chlorine radicals thus formed, initiate the chain reaction for ozone depletion as described earlier.
Educational Objective: Test candidate's understanding of Ozone hole formation.
When sunlight returns to Antarctica in the spring, the sun’s warmth breaks up the clouds and HOCl and Cl2 are photolysed by sunlight, as given in reactions (viii) and (ix). The chlorine radicals thus formed, initiate the chain reaction for ozone depletion as described earlier.
Educational Objective: Test candidate's understanding of Ozone hole formation.
The acidification of oceans is increasing. Why is this phenomenon a cause of concern?
1) The growth and survival of calcareous phytoplankton will be adversely affected.
2) The growth and survival of coral reefs will be adversely affected.
3) The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4) The cloud seeding and formation of clouds will beadversely affected.
Which of statements given above is / are correct?- a)1,2 and 3 only
- b)2 only
- c)1 and 3 only
- d)1,2,3 and 4
Correct answer is option 'D'. Can you explain this answer?
The acidification of oceans is increasing. Why is this phenomenon a cause of concern?
1) The growth and survival of calcareous phytoplankton will be adversely affected.
2) The growth and survival of coral reefs will be adversely affected.
3) The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4) The cloud seeding and formation of clouds will beadversely affected.
Which of statements given above is / are correct?
1) The growth and survival of calcareous phytoplankton will be adversely affected.
2) The growth and survival of coral reefs will be adversely affected.
3) The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4) The cloud seeding and formation of clouds will beadversely affected.
Which of statements given above is / are correct?
a)
1,2 and 3 only
b)
2 only
c)
1 and 3 only
d)
1,2,3 and 4
| | Abhijeet Chavan answered |
The Acidification of Oceans - A cause of concern
Introduction:
Ocean acidification is a phenomenon that results from the dissolution of carbon dioxide (CO2) in seawater. The increase in CO2 concentration in the atmosphere leads to an increase in the amount of CO2 that dissolves in seawater, causing a decrease in ocean pH.
Effects of ocean acidification:
Ocean acidification has numerous effects on marine ecosystems. Some of the significant effects are:
1. Adverse effect on calcareous phytoplankton:
Calcareous phytoplankton, such as coccolithophores, are tiny marine organisms that play a vital role in the ocean's food chain. They are an essential source of food for many marine organisms, including zooplankton, which, in turn, are food for larger animals. The acidification of seawater makes it difficult for these organisms to form their calcium carbonate shells. This leads to a decline in their population, which has a cascading effect on the entire marine ecosystem.
2. Adverse effect on coral reefs:
Coral reefs are one of the most biodiverse ecosystems on the planet. They are made up of tiny polyps that build calcium carbonate skeletons. The acidification of seawater makes it difficult for these polyps to build their skeletons, which can lead to the loss of coral reefs. Coral reefs provide habitat and shelter for a vast number of marine organisms, including fish and invertebrates. The loss of coral reefs can have a significant impact on the entire marine ecosystem.
3. Adverse effect on animals with phytoplanktonic larvae:
Many marine animals, such as oysters, clams, and sea urchins, have larvae that feed on phytoplankton. The acidification of seawater makes it difficult for these larvae to find food, which can lead to a decline in their population.
4. Adverse effect on cloud seeding and formation:
Clouds play a vital role in regulating the Earth's climate. They reflect sunlight back into space, which helps to cool the planet. The acidification of seawater can impact cloud seeding and formation, which can have a significant impact on the Earth's climate.
Conclusion:
In conclusion, ocean acidification is a growing concern for marine ecosystems. It has numerous adverse effects on marine organisms, including calcareous phytoplankton, coral reefs, and animals with phytoplanktonic larvae. It can also impact cloud seeding and formation, which can have a significant impact on the Earth's climate. It is essential to take steps to reduce CO2 emissions to slow down the process of ocean acidification.
Introduction:
Ocean acidification is a phenomenon that results from the dissolution of carbon dioxide (CO2) in seawater. The increase in CO2 concentration in the atmosphere leads to an increase in the amount of CO2 that dissolves in seawater, causing a decrease in ocean pH.
Effects of ocean acidification:
Ocean acidification has numerous effects on marine ecosystems. Some of the significant effects are:
1. Adverse effect on calcareous phytoplankton:
Calcareous phytoplankton, such as coccolithophores, are tiny marine organisms that play a vital role in the ocean's food chain. They are an essential source of food for many marine organisms, including zooplankton, which, in turn, are food for larger animals. The acidification of seawater makes it difficult for these organisms to form their calcium carbonate shells. This leads to a decline in their population, which has a cascading effect on the entire marine ecosystem.
2. Adverse effect on coral reefs:
Coral reefs are one of the most biodiverse ecosystems on the planet. They are made up of tiny polyps that build calcium carbonate skeletons. The acidification of seawater makes it difficult for these polyps to build their skeletons, which can lead to the loss of coral reefs. Coral reefs provide habitat and shelter for a vast number of marine organisms, including fish and invertebrates. The loss of coral reefs can have a significant impact on the entire marine ecosystem.
3. Adverse effect on animals with phytoplanktonic larvae:
Many marine animals, such as oysters, clams, and sea urchins, have larvae that feed on phytoplankton. The acidification of seawater makes it difficult for these larvae to find food, which can lead to a decline in their population.
4. Adverse effect on cloud seeding and formation:
Clouds play a vital role in regulating the Earth's climate. They reflect sunlight back into space, which helps to cool the planet. The acidification of seawater can impact cloud seeding and formation, which can have a significant impact on the Earth's climate.
Conclusion:
In conclusion, ocean acidification is a growing concern for marine ecosystems. It has numerous adverse effects on marine organisms, including calcareous phytoplankton, coral reefs, and animals with phytoplanktonic larvae. It can also impact cloud seeding and formation, which can have a significant impact on the Earth's climate. It is essential to take steps to reduce CO2 emissions to slow down the process of ocean acidification.
Eutrophication Main contaminants- a)Phosphorus and Sulphur
- b)Nitrogen and phosphorus
- c)Sulphur and chlorine
- d)Flourine and Phosphorus
Correct answer is option 'B'. Can you explain this answer?
Eutrophication Main contaminants
a)
Phosphorus and Sulphur
b)
Nitrogen and phosphorus
c)
Sulphur and chlorine
d)
Flourine and Phosphorus
| | Rahul answered |
The most common nutrients causing eutrophication are nitrogen N and phosphorus P. The main source of nitrogen pollutants is run-off from agricultural land, whereas most phosphorus pollution comes from households and industry, including phosphorus-based detergents.
Size of the particles according CPCB which causes irritation and premature death- a)1.5 mm
- b)2.5 mm
- c)Particles less than size 2.5mm
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Size of the particles according CPCB which causes irritation and premature death
a)
1.5 mm
b)
2.5 mm
c)
Particles less than size 2.5mm
d)
All of the above
| | Anjali Sharma answered |
Acc to cpcb particles that are harmul or of size 2.5mm and less than 2.5 mm
Which one of the following is associated with the issue of control and phasing out of the use of ozone-depleting substances?- a)Bretton Woods Conference
- b)Montreal Protocol
- c)Kyoto Protocol
- d)Nagoya Protocol
Correct answer is option 'B'. Can you explain this answer?
Which one of the following is associated with the issue of control and phasing out of the use of ozone-depleting substances?
a)
Bretton Woods Conference
b)
Montreal Protocol
c)
Kyoto Protocol
d)
Nagoya Protocol
 | Maya Choudhary answered |
Montreal Protocol is associated with the issue of control and phasing out of the use of ozone-depleting substances.
Background:
In the 1970s and 1980s, scientists discovered a hole in the ozone layer over Antarctica. The ozone layer, which absorbs harmful ultraviolet radiation from the sun, is important for protecting life on Earth. It was found that certain man-made chemicals, such as chlorofluorocarbons (CFCs), were responsible for the depletion of the ozone layer.
Montreal Protocol:
To address this issue, the international community came together to negotiate the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The aim of the protocol was to phase out the production and consumption of ozone-depleting substances.
Key Provisions:
- The protocol required participating countries to phase out the production and consumption of ozone-depleting substances, such as CFCs, halons, and methyl bromide.
- It established a timetable for the phase-out, with developed countries required to phase out production and consumption by 1996, and developing countries given longer timelines.
- The protocol also established a financial mechanism to support developing countries in their efforts to phase out ozone-depleting substances.
Impact:
The Montreal Protocol has been successful in reducing the production and consumption of ozone-depleting substances. As a result, the ozone layer is slowly recovering, and it is expected to fully recover by the middle of this century.
Conclusion:
The Montreal Protocol is an important international agreement that demonstrates the ability of the international community to come together to address global environmental issues.
Background:
In the 1970s and 1980s, scientists discovered a hole in the ozone layer over Antarctica. The ozone layer, which absorbs harmful ultraviolet radiation from the sun, is important for protecting life on Earth. It was found that certain man-made chemicals, such as chlorofluorocarbons (CFCs), were responsible for the depletion of the ozone layer.
Montreal Protocol:
To address this issue, the international community came together to negotiate the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The aim of the protocol was to phase out the production and consumption of ozone-depleting substances.
Key Provisions:
- The protocol required participating countries to phase out the production and consumption of ozone-depleting substances, such as CFCs, halons, and methyl bromide.
- It established a timetable for the phase-out, with developed countries required to phase out production and consumption by 1996, and developing countries given longer timelines.
- The protocol also established a financial mechanism to support developing countries in their efforts to phase out ozone-depleting substances.
Impact:
The Montreal Protocol has been successful in reducing the production and consumption of ozone-depleting substances. As a result, the ozone layer is slowly recovering, and it is expected to fully recover by the middle of this century.
Conclusion:
The Montreal Protocol is an important international agreement that demonstrates the ability of the international community to come together to address global environmental issues.
Consider the following:
1) Rice fields
2) Coal mining
3) Domestic Animals
4) Wetlands
Which of the above are sources of methane, a major greenhouse gas?- a)1 and 4 only
- b)2 and 3 only
- c)1, 2 and 3 only
- d)1, 2, 3 and 4
Correct answer is option 'D'. Can you explain this answer?
Consider the following:
1) Rice fields
2) Coal mining
3) Domestic Animals
4) Wetlands
Which of the above are sources of methane, a major greenhouse gas?
1) Rice fields
2) Coal mining
3) Domestic Animals
4) Wetlands
Which of the above are sources of methane, a major greenhouse gas?
a)
1 and 4 only
b)
2 and 3 only
c)
1, 2 and 3 only
d)
1, 2, 3 and 4
 | Tarun Sen answered |
Sources of Methane as a Greenhouse Gas
Methane is a potent greenhouse gas that contributes to global warming. Sources of methane include:
1) Rice fields
2) Coal mining
3) Domestic animals
4) Wetlands
Explanation:
1) Rice fields: Methane is produced in rice paddies due to the anaerobic conditions in the soil. When rice fields are flooded, organic matter in the soil breaks down and produces methane as a byproduct.
2) Coal mining: Methane is often found in coal seams and can be released during mining operations. This methane can escape into the atmosphere and contribute to global warming.
3) Domestic animals: Methane is produced during the digestive process of domestic animals, such as cows and sheep. This methane is released through belching and flatulence.
4) Wetlands: Wetlands are natural sources of methane due to the anaerobic conditions in the soil. When organic matter in the soil breaks down, methane is produced as a byproduct.
Conclusion:
All of the above sources are major contributors to methane emissions and therefore contribute to global warming. It is important to find ways to reduce methane emissions from these sources in order to mitigate the impacts of climate change.
Methane is a potent greenhouse gas that contributes to global warming. Sources of methane include:
1) Rice fields
2) Coal mining
3) Domestic animals
4) Wetlands
Explanation:
1) Rice fields: Methane is produced in rice paddies due to the anaerobic conditions in the soil. When rice fields are flooded, organic matter in the soil breaks down and produces methane as a byproduct.
2) Coal mining: Methane is often found in coal seams and can be released during mining operations. This methane can escape into the atmosphere and contribute to global warming.
3) Domestic animals: Methane is produced during the digestive process of domestic animals, such as cows and sheep. This methane is released through belching and flatulence.
4) Wetlands: Wetlands are natural sources of methane due to the anaerobic conditions in the soil. When organic matter in the soil breaks down, methane is produced as a byproduct.
Conclusion:
All of the above sources are major contributors to methane emissions and therefore contribute to global warming. It is important to find ways to reduce methane emissions from these sources in order to mitigate the impacts of climate change.
In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?
1) Abandoned and uneconomic coal seams
2) Depleted oil and gas reservoirs
3) Subterranean deep saline formations
Select the correct answer using the code given below- a)1 and 2 only
- b)3 only
- c)1 and 3 only
- d)1,2 and 3
Correct answer is option 'D'. Can you explain this answer?
In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?
1) Abandoned and uneconomic coal seams
2) Depleted oil and gas reservoirs
3) Subterranean deep saline formations
Select the correct answer using the code given below
1) Abandoned and uneconomic coal seams
2) Depleted oil and gas reservoirs
3) Subterranean deep saline formations
Select the correct answer using the code given below
a)
1 and 2 only
b)
3 only
c)
1 and 3 only
d)
1,2 and 3
| | Anjana Singh answered |
Explanation: Carbon sequestration or carbon dioxide removal is the long-term removal, capture or sequestration of carbon dioxide from the atmosphere to slow or reverse atmospheric CO2 pollution and to mitigate or reverse global warming. The carbon that is captured can be stored in geological formations such as deep saline aquifers, basalt formations, unmineable coal seams and depleted oil or gas reservoirs. Hence all the given options are correct.
Educational Objective: To learn various methods that can be employed to reduce the release of various Greenhouse Gases.
Educational Objective: To learn various methods that can be employed to reduce the release of various Greenhouse Gases.
Consider the following statements: Chlorofluorocarbons, known as ozonedepleting substances, are used.
1) In the production of plastic foams
2) In the production of tubeless tyres
3) In cleaning certain electronic components
4) As pressurizing agents in aerosol cans
Which of the statements given above is/are correct?- a)1, 2 and 3 only
- b)4 only
- c)1, 3 and 4 only
- d)1, 2, 3 and 4
Correct answer is option 'C'. Can you explain this answer?
Consider the following statements: Chlorofluorocarbons, known as ozonedepleting substances, are used.
1) In the production of plastic foams
2) In the production of tubeless tyres
3) In cleaning certain electronic components
4) As pressurizing agents in aerosol cans
Which of the statements given above is/are correct?
1) In the production of plastic foams
2) In the production of tubeless tyres
3) In cleaning certain electronic components
4) As pressurizing agents in aerosol cans
Which of the statements given above is/are correct?
a)
1, 2 and 3 only
b)
4 only
c)
1, 3 and 4 only
d)
1, 2, 3 and 4
 | Bayshore Academy answered |
Explanation: CFCs are widely used in four areas: aerosol propellants, solvents in the cleaning of electronic components and metals, refrigerants, and the blowing agents in foam plastic manufacturing. In aerosols, CFCs such as trichlorofluoro methane (CCl3F, CFC-11) and dichlorodifluoromethane (CCl2F2) were normally packed with materials like paint, insecticide, or cosmetic preparations in pressurized canisters. Tubeless tyre has no component which is a Greenhouse Gas. Hence it is the required answer.
Educational Objective: To learn different sources of Greenhouse Gases.
Educational Objective: To learn different sources of Greenhouse Gases.
In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of Sulphate aerosol into stratosphere?- a)Creating the artificial rains in some regions
- b)Reducing the frequency and intensity of tropical cyclones
- c)Reducing the adverse effects of solar wind on the earth
- d)Reducing the global warming
Correct answer is option 'D'. Can you explain this answer?
In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of Sulphate aerosol into stratosphere?
a)
Creating the artificial rains in some regions
b)
Reducing the frequency and intensity of tropical cyclones
c)
Reducing the adverse effects of solar wind on the earth
d)
Reducing the global warming
| | Anjana Singh answered |
Explanation: Cirrus cloud thinning is a proposed form of climate engineering. Cirrus clouds are high cold ice that, like other clouds, both reflect sunlight and absorb warming infrared radiation. However, they differ from other types of clouds in that, on average, infrared absorption outweighs sunlight reflection, resulting in a net warming effect on the climate. Therefore, thinning or removing these clouds would reduce their heat trapping capacity, resulting in a cooling effect on Earth's climate. This could be a potential tool to reduce anthropogenic global warming. Cirrus cloud thinning is an alternative category of climate engineering, in addition to solar radiation management and greenhouse gas removal. Solar Winds have hardly any significant impact on earth hence it is incorrect.
Reducing the frequency and intensity of tropical cyclones requires altering ocean water temperatures which is humanly impossible and hence is incorrect.
Artificial rains are created by spraying Dry Ice(solid carbon dioxide), Silver Iodide, Salt powder etc. on the rain bearing clouds. Hence it is incorrect.
Educational Objective: Test candidate's knowledge of various methods being suggeted to reduce the effect of global warming.
Reducing the frequency and intensity of tropical cyclones requires altering ocean water temperatures which is humanly impossible and hence is incorrect.
Artificial rains are created by spraying Dry Ice(solid carbon dioxide), Silver Iodide, Salt powder etc. on the rain bearing clouds. Hence it is incorrect.
Educational Objective: Test candidate's knowledge of various methods being suggeted to reduce the effect of global warming.
The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs:- a)The water vapour of the air and retains its heat
- b)The ultraviolet part of the solar radiation
- c)All the solar radiations
- d)The infrared part of the solar radiation
Correct answer is option 'D'. Can you explain this answer?
The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs:
a)
The water vapour of the air and retains its heat
b)
The ultraviolet part of the solar radiation
c)
All the solar radiations
d)
The infrared part of the solar radiation
| | Meera Kapoor answered |
Explanation: Molecules of carbon dioxide (CO2) can absorb energy from infrared (IR) radiation. This ability to absorb and re-emit infrared energy is what makes CO2 an effective heattrapping greenhouse gas. Not all gas molecules are able to absorb IR radiation. For example, Nitrogen (N2) and Oxygen (O2), which make up more than 90% of Earth's atmosphere, do not absorb infrared photons. CO2 molecules can vibrate in ways that simpler nitrogen and oxygen molecules cannot, which allows CO2 molecules to capture the IR photons.
Water vapour in the atmosphere does act as a greenhouse gas, however this is not because of its absorption by carbon dioxide. Air in general has water vapour which traps heat and provides a warming effect. It is the infrared part of solar radiation which carries heat. Even if Carbon Dioxide trapped
Ultra Violet light it would not lead to rise in temperature. Therefore (b) is a made up statement.
If Carbon Dioxide were to trap all the Solar Radiation, the Earth would have had a cooling effect instead of rise in temperature. Hence option C is incorrect as well.
Educational Objective: Test candidate's knowledge of harmful effects of carbon dioxide on the environment.
Water vapour in the atmosphere does act as a greenhouse gas, however this is not because of its absorption by carbon dioxide. Air in general has water vapour which traps heat and provides a warming effect. It is the infrared part of solar radiation which carries heat. Even if Carbon Dioxide trapped
Ultra Violet light it would not lead to rise in temperature. Therefore (b) is a made up statement.
If Carbon Dioxide were to trap all the Solar Radiation, the Earth would have had a cooling effect instead of rise in temperature. Hence option C is incorrect as well.
Educational Objective: Test candidate's knowledge of harmful effects of carbon dioxide on the environment.
Which is crucial for disposal of hospital waste- a)Incinators
- b)Autoclavy
Correct answer is option 'A'. Can you explain this answer?
Which is crucial for disposal of hospital waste
a)
Incinators
b)
Autoclavy
 | Gaurav Kumar answered |
Incinators are main for disposal of hospital wastes
BOD of water is increaed then what are the consequences faced - DO increases
- DO decreases
- Suitable water for aquatic growth
- Unsafe for ecosystem
- a)1 and 3 are only correct
- b)only 2 is incorrect
- c)2 and 4 are only correct
- d)All of the above are correct
Correct answer is option 'C'. Can you explain this answer?
BOD of water is increaed then what are the consequences faced
- DO increases
- DO decreases
- Suitable water for aquatic growth
- Unsafe for ecosystem
a)
1 and 3 are only correct
b)
only 2 is incorrect
c)
2 and 4 are only correct
d)
All of the above are correct
| | Raghav Bansal answered |
Microorganisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen, as a result there is a sharp decline in Dissolved Oxygen (DO), causing mortality of fishes and other aquatic creatures
El nino effect is due to which of the following gases- OZONE
- NITROGEN DIOXIDE
- CFC
- SLUPHUR DIOXIDE
- CARBON DIOXIDE
- METHANE
- a)Option 2 and 3
- b)Option 4 is only wrong
- c)Option 2 is only wrong
- d)All of the above
Correct answer is option 'B'. Can you explain this answer?
El nino effect is due to which of the following gases
- OZONE
- NITROGEN DIOXIDE
- CFC
- SLUPHUR DIOXIDE
- CARBON DIOXIDE
- METHANE
a)
Option 2 and 3
b)
Option 4 is only wrong
c)
Option 2 is only wrong
d)
All of the above
| | Dev Patel answered |
El nino effect is melting of ice polar caps due to green house gases
Montreal Protocol main objective- a)Increase of green house Gases
- b)Decrease of usage of green House gases
- c)Reduction in usage og Ozone depleting sustances
- d)Option 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Montreal Protocol main objective
a)
Increase of green house Gases
b)
Decrease of usage of green House gases
c)
Reduction in usage og Ozone depleting sustances
d)
Option 2 and 3
| | Ananya Das answered |
Montreal protocol signed in 1987 to control usage of ozone depleting substances
In 1987 Noise is Amended to which act ?- a)Air act - 1981
- b)Sound pollution act -1984
- c)Pollution Act - 1986
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
In 1987 Noise is Amended to which act ?
a)
Air act - 1981
b)
Sound pollution act -1984
c)
Pollution Act - 1986
d)
None of the above
 | Preeti Iyer answered |
The Air (Prevention and control of pollution) Act 1981, was amended in 1987, to include NOISE as an air-pollutant
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