UPSC Prelims 2011
Get UPSC Prelims Previous Year Question (PYQ) Papers with detailed explanations, mindmaps, organized year-wise and subject-wise for GS.
- Environment & Ecology
In the Union Budget 2011-12, a full exemption from basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
- Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
- Bioasphalt can be made from non-renewable resources.
- Bioasphalt can be made from organic waste materials.
- It is eco-friendly to use bioasphalt for surfacing of the roads.
Which of the statements given above are correct?
View Answer for: In the Union Budget 2011-12, a full exemption from basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material? Unlike traditional asphalt, bio-asphalt is not based on fossil fuels. Bioasphalt can be made from non-renewable resources. Bioasphalt can be made from organic waste materials. It is eco-friendly to use bioasphalt for surfacing of the roads.Which of the statements given above are correct?In the Union Budget 2011-12, a full exemption from basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
- Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
- Bioasphalt can be made from non-renewable resources.
- Bioasphalt can be made from organic waste materials.
- It is eco-friendly to use bioasphalt for surfacing of the roads.
Which of the statements given above are correct?
- Environment & Ecology
Microbial fuel cells are considered a source of sustainable energy. Why?
- They use living organisms as catalysts to generate electricity from certain substrates.
- They use a variety of inorganic materials as substrates.
- They can be installed in wastewater treatment plants to cleanse water and produce electricity.
Which of the following statements given above is/ are correct?
View Answer for: Microbial fuel cells are considered a source of sustainable energy. Why? They use living organisms as catalysts to generate electricity from certain substrates. They use a variety of inorganic materials as substrates. They can be installed in wastewater treatment plants to cleanse water and produce electricity.Which of the following statements given above is/ are correct?Microbial fuel cells are considered a source of sustainable energy. Why?
- They use living organisms as catalysts to generate electricity from certain substrates.
- They use a variety of inorganic materials as substrates.
- They can be installed in wastewater treatment plants to cleanse water and produce electricity.
Which of the following statements given above is/ are correct?
- Environment & Ecology
In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the:
- decomposer microorganisms to the surface.
- nutrients to the surface.
- bottom-dwelling organisms to- the surface.
Which of the statements given above is/are correct?
View Answer for: In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the: decomposer microorganisms to the surface. nutrients to the surface. bottom-dwelling organisms to- the surface.Which of the statements given above is/are correct?In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the:
- decomposer microorganisms to the surface.
- nutrients to the surface.
- bottom-dwelling organisms to- the surface.
Which of the statements given above is/are correct?
- Environment & Ecology
Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of :
- its escape into the outer stratosphere.
- the photosynthesis by phytoplankton in the oceans.
- the trapping of air in the polar ice caps.
Which of the statements given above is/are correct?
View Answer for: Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of : its escape into the outer stratosphere. the photosynthesis by phytoplankton in the oceans. the trapping of air in the polar ice caps.Which of the statements given above is/are correct?Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of :
- its escape into the outer stratosphere.
- the photosynthesis by phytoplankton in the oceans.
- the trapping of air in the polar ice caps.
Which of the statements given above is/are correct?
- Environment & Ecology
The “Red Data Book” published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of -
- Endemic plant and animal species present in the biodiversity hotspots,
- Threatened plant and animal species.
- Protected sites for conservation of nature and natural resources in various countries.
Select the correct answer using the codes given below:
View Answer for: The “Red Data Book” published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of - Endemic plant and animal species present in the biodiversity hotspots, Threatened plant and animal species. Protected sites for conservation of nature and natural resources in various countries.Select the correct answer using the codes given below:The “Red Data Book” published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of -
- Endemic plant and animal species present in the biodiversity hotspots,
- Threatened plant and animal species.
- Protected sites for conservation of nature and natural resources in various countries.
Select the correct answer using the codes given below:
- Environment & Ecology
Recently, "oil zapper" was in the news. What is it?
View Answer for: Recently, "oil zapper" was in the news. What is it?Recently, "oil zapper" was in the news. What is it?
- Environment & Ecology
Regarding “carbon credits”, which one of the following statements is not correct?
View Answer for: Regarding “carbon credits”, which one of the following statements is not correct?Regarding “carbon credits”, which one of the following statements is not correct?
- Environment & Ecology
The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?
View Answer for: The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?
- Environment & Ecology
Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
View Answer for: Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
- Environment & Ecology
There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
- Discharge of nutrients from the estuaries.
- Run-off from the land during the monsoon.
- Upwelling in the seas.
Select the correct answer from the codes given below:
View Answer for: There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon? Discharge of nutrients from the estuaries. Run-off from the land during the monsoon. Upwelling in the seas.Select the correct answer from the codes given below:There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
- Discharge of nutrients from the estuaries.
- Run-off from the land during the monsoon.
- Upwelling in the seas.
Select the correct answer from the codes given below:
- Environment & Ecology
The formation of the ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
View Answer for: The formation of the ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?The formation of the ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
- Environment & Ecology
A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?
View Answer for: A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?
- Environment & Ecology
Three of the following criteria have contributed to the recognition of Western Ghats-Sri Lanka and Indo-Burma regions as hotspots of biodiversity:
- Species richness
- Vegetation density
- Endemism
- Ethno-botanical importance
- Threat perception
- Adaptation of flora and fauna to warm and humid conditions
Which three of the above are the correct criteria in this context?
View Answer for: Three of the following criteria have contributed to the recognition of Western Ghats-Sri Lanka and Indo-Burma regions as hotspots of biodiversity: Species richness Vegetation density Endemism Ethno-botanical importance Threat perception Adaptation of flora and fauna to warm and humid conditionsWhich three of the above are the correct criteria in this context?Three of the following criteria have contributed to the recognition of Western Ghats-Sri Lanka and Indo-Burma regions as hotspots of biodiversity:
- Species richness
- Vegetation density
- Endemism
- Ethno-botanical importance
- Threat perception
- Adaptation of flora and fauna to warm and humid conditions
Which three of the above are the correct criteria in this context?
- Environment & Ecology
The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
View Answer for: The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
- Environment & Ecology
Which one of the following is not a site for the in-situ method of conservation of flora?
View Answer for: Which one of the following is not a site for the in-situ method of conservation of flora?Which one of the following is not a site for the in-situ method of conservation of flora?
- Environment & Ecology
Consider the following :
- Photosynthesis.
- Respiration.
- The decay of organic matter.
- Volcanic action.
Which of the above add carbon dioxide to the carbon cycle on Earth?
View Answer for: Consider the following : Photosynthesis. Respiration. The decay of organic matter. Volcanic action.Which of the above add carbon dioxide to the carbon cycle on Earth?Consider the following :
- Photosynthesis.
- Respiration.
- The decay of organic matter.
- Volcanic action.
Which of the above add carbon dioxide to the carbon cycle on Earth?
- Environment & Ecology
With reference to India, consider the following Central Acts:
- Import and Export (Control) Act, 1947
- Mining and Mineral Development (Regulation) Act, 1957
- Customs Act, 1962
- Indian Forest Act, 1927
Which of the above Acts have relevance to/bearing on the biodiversity conservation in the country?
View Answer for: With reference to India, consider the following Central Acts: Import and Export (Control) Act, 1947 Mining and Mineral Development (Regulation) Act, 1957 Customs Act, 1962 Indian Forest Act, 1927Which of the above Acts have relevance to/bearing on the biodiversity conservation in the country?With reference to India, consider the following Central Acts:
- Import and Export (Control) Act, 1947
- Mining and Mineral Development (Regulation) Act, 1957
- Customs Act, 1962
- Indian Forest Act, 1927
Which of the above Acts have relevance to/bearing on the biodiversity conservation in the country?
- Environment & Ecology
Biodiversity forms the basis for human existence in the following ways :
- Soil formation
- Prevention of soil erosion
- Recycling of waste
- Pollination of crops
Select the correct answer using the codes given below:
View Answer for: Biodiversity forms the basis for human existence in the following ways : Soil formation Prevention of soil erosion Recycling of waste Pollination of cropsSelect the correct answer using the codes given below:Biodiversity forms the basis for human existence in the following ways :
- Soil formation
- Prevention of soil erosion
- Recycling of waste
- Pollination of crops
Select the correct answer using the codes given below:
- Environment & Ecology
Consider the following:
- Carbon dioxide
- Oxides of Nitrogen
- Oxides of Sulphur
Which of the above is/are the emission/ emissions from coal combustion at thermal power plants?
View Answer for: Consider the following: Carbon dioxide Oxides of Nitrogen Oxides of SulphurWhich of the above is/are the emission/ emissions from coal combustion at thermal power plants?Consider the following:
- Carbon dioxide
- Oxides of Nitrogen
- Oxides of Sulphur
Which of the above is/are the emission/ emissions from coal combustion at thermal power plants?
- Environment & Ecology
Consider the following statements:
- Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
- Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.
Which of the statements given above is/are correct?
View Answer for: Consider the following statements: Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.Which of the statements given above is/are correct?Consider the following statements:
- Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
- Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.
Which of the statements given above is/are correct?
- Environment & Ecology
What is the difference between a CFL and an LED lamp?
- To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.
- The average lifespan of a CFL is much longer than that of an LED lamp.
- A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
View Answer for: What is the difference between a CFL and an LED lamp? To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material. The average lifespan of a CFL is much longer than that of an LED lamp. A CFL is less energy-efficient as compared to an LED lamp.Which of the statements given above is/are correct?What is the difference between a CFL and an LED lamp?
- To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.
- The average lifespan of a CFL is much longer than that of an LED lamp.
- A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
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