UPSC Static Quiz – Environment : 3 May 2025
Kartavya Desk Staff
UPSC Static Quiz – Environment : 3 May 2025 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more.We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.
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• Question 1 of 5 1. Question Mangrove Forests in India are predominantly found in which of the following states? West Bengal Odisha Madhya Pradesh Andhra Pradesh Gujarat How many of the above options is/are correct? (a) Only two (b) Only three (c) Only four (d) All five Correct Solution: c) Option 3 is incorrect. Solution: c) Option 3 is incorrect. Incorrect Solution: c) Option 3 is incorrect. Solution: c) Option 3 is incorrect.
#### 1. Question
Mangrove Forests in India are predominantly found in which of the following states?
• West Bengal
• Madhya Pradesh
• Andhra Pradesh
How many of the above options is/are correct?
• (a) Only two
• (b) Only three
• (c) Only four
• (d) All five
Solution: c)
Option 3 is incorrect.
Solution: c)
Option 3 is incorrect.
Solution: c)
Option 3 is incorrect.
Solution: c)
Option 3 is incorrect.
• Question 2 of 5 2. Question Consider the following statements regarding Ocean deoxygenation. Ocean deoxygenation is the maximum reduction of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide. Oxygen is less soluble in warmer water. The areas of Sea water that is depleted of dissolved oxygen is called Anoxic waters. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: b) Statement 1 is incorrect. Ocean deoxygenation is the expansion of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide. The change has been fairly rapid and poses a threat to fish and other types of marine life, as well as to people who depend on marine life for nutrition or livelihood. Ocean deoxygenation poses implications for ocean productivity, nutrient cycling, carbon cycling, and marine habitats. Most of the excess heat from CO2 and other greenhouse gas emissions is absorbed by the oceans. Warmer oceans cause deoxygenation both because oxygen is less soluble in warmer water, and through temperature driven stratification of the ocean which inhibits the production of oxygen from photosynthesis. Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen and are a more severe condition of hypoxia. Incorrect Solution: b) Statement 1 is incorrect. Ocean deoxygenation is the expansion of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide. The change has been fairly rapid and poses a threat to fish and other types of marine life, as well as to people who depend on marine life for nutrition or livelihood. Ocean deoxygenation poses implications for ocean productivity, nutrient cycling, carbon cycling, and marine habitats. Most of the excess heat from CO2 and other greenhouse gas emissions is absorbed by the oceans. Warmer oceans cause deoxygenation both because oxygen is less soluble in warmer water, and through temperature driven stratification of the ocean which inhibits the production of oxygen from photosynthesis. Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen and are a more severe condition of hypoxia.
#### 2. Question
Consider the following statements regarding Ocean deoxygenation.
• Ocean deoxygenation is the maximum reduction of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide.
• Oxygen is less soluble in warmer water.
• The areas of Sea water that is depleted of dissolved oxygen is called Anoxic waters.
How many of the above statements is/are correct?
• (a) Only one
• (b) Only two
• (c) All three
Solution: b)
Statement 1 is incorrect.
Ocean deoxygenation is the expansion of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide. The change has been fairly rapid and poses a threat to fish and other types of marine life, as well as to people who depend on marine life for nutrition or livelihood.
Ocean deoxygenation poses implications for ocean productivity, nutrient cycling, carbon cycling, and marine habitats.
Most of the excess heat from CO2 and other greenhouse gas emissions is absorbed by the oceans. Warmer oceans cause deoxygenation both because oxygen is less soluble in warmer water, and through temperature driven stratification of the ocean which inhibits the production of oxygen from photosynthesis.
Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen and are a more severe condition of hypoxia.
Solution: b)
Statement 1 is incorrect.
Ocean deoxygenation is the expansion of oxygen minimum zones in the world’s oceans as a consequence of anthropogenic emissions of carbon dioxide. The change has been fairly rapid and poses a threat to fish and other types of marine life, as well as to people who depend on marine life for nutrition or livelihood.
Ocean deoxygenation poses implications for ocean productivity, nutrient cycling, carbon cycling, and marine habitats.
Most of the excess heat from CO2 and other greenhouse gas emissions is absorbed by the oceans. Warmer oceans cause deoxygenation both because oxygen is less soluble in warmer water, and through temperature driven stratification of the ocean which inhibits the production of oxygen from photosynthesis.
Anoxic waters are areas of sea water, fresh water, or groundwater that are depleted of dissolved oxygen and are a more severe condition of hypoxia.
• Question 3 of 5 3. Question The phenomenon of increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain is known as: a) Bioaccumulation b) Biodilution c) Biomagnification d) Biosparging Correct Solution: c) Biomagnification refers to the process by which the concentration of a toxic substance—such as heavy metals (like mercury) or persistent organic pollutants (like DDT)—increases progressively at each trophic level of a food chain. Unlike bioaccumulation, which refers to the buildup of substances in a single organism over time, biomagnification deals with the amplification of that concentration as predators consume prey that already carry the toxic load. For example, small aquatic organisms may absorb mercury from contaminated water. These organisms are eaten by small fish, which are in turn consumed by larger fish, and eventually by top predators or humans. At each step, the concentration of mercury becomes more potent because the predator absorbs all the contaminants present in its prey. This process poses serious risks to both wildlife and humans, especially those at the top of the food chain. Incorrect Solution: c) Biomagnification refers to the process by which the concentration of a toxic substance—such as heavy metals (like mercury) or persistent organic pollutants (like DDT)—increases progressively at each trophic level of a food chain. Unlike bioaccumulation, which refers to the buildup of substances in a single organism over time, biomagnification deals with the amplification of that concentration as predators consume prey that already carry the toxic load. For example, small aquatic organisms may absorb mercury from contaminated water. These organisms are eaten by small fish, which are in turn consumed by larger fish, and eventually by top predators or humans. At each step, the concentration of mercury becomes more potent because the predator absorbs all the contaminants present in its prey. This process poses serious risks to both wildlife and humans, especially those at the top of the food chain.
#### 3. Question
The phenomenon of increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain is known as:
• a) Bioaccumulation
• b) Biodilution
• c) Biomagnification
• d) Biosparging
Solution: c)
• Biomagnification refers to the process by which the concentration of a toxic substance—such as heavy metals (like mercury) or persistent organic pollutants (like DDT)—increases progressively at each trophic level of a food chain. Unlike bioaccumulation, which refers to the buildup of substances in a single organism over time, biomagnification deals with the amplification of that concentration as predators consume prey that already carry the toxic load.
• For example, small aquatic organisms may absorb mercury from contaminated water. These organisms are eaten by small fish, which are in turn consumed by larger fish, and eventually by top predators or humans. At each step, the concentration of mercury becomes more potent because the predator absorbs all the contaminants present in its prey. This process poses serious risks to both wildlife and humans, especially those at the top of the food chain.
Solution: c)
• Biomagnification refers to the process by which the concentration of a toxic substance—such as heavy metals (like mercury) or persistent organic pollutants (like DDT)—increases progressively at each trophic level of a food chain. Unlike bioaccumulation, which refers to the buildup of substances in a single organism over time, biomagnification deals with the amplification of that concentration as predators consume prey that already carry the toxic load.
• For example, small aquatic organisms may absorb mercury from contaminated water. These organisms are eaten by small fish, which are in turn consumed by larger fish, and eventually by top predators or humans. At each step, the concentration of mercury becomes more potent because the predator absorbs all the contaminants present in its prey. This process poses serious risks to both wildlife and humans, especially those at the top of the food chain.
• Question 4 of 5 4. Question The constituents of the coal combustion include: arsenic beryllium cadmium manganese mercury How many of the above options is/are correct? (a) Only two (b) Only three (c) Only four (d) All five Correct Solution: d) What is Fly Ash? Popularly known as Flue ash or pulverised fuel ash, it is a coal combustion product. Composition: Composed of the particulates that are driven out of coal-fired boilers together with the flue gases. Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2), aluminium oxide (Al2O3) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata. Minor constituents include: arsenic, beryllium, boron, cadmium, chromium, hexavalent chromium, cobalt, lead, manganese, mercury, molybdenum, selenium, strontium, thallium, and vanadium, along with very small concentrations of dioxins and PAH compounds. It also has unburnt carbon. Incorrect Solution: d) What is Fly Ash? Popularly known as Flue ash or pulverised fuel ash, it is a coal combustion product. Composition: Composed of the particulates that are driven out of coal-fired boilers together with the flue gases. Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2), aluminium oxide (Al2O3) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata. Minor constituents include: arsenic, beryllium, boron, cadmium, chromium, hexavalent chromium, cobalt, lead, manganese, mercury, molybdenum, selenium, strontium, thallium, and vanadium, along with very small concentrations of dioxins and PAH compounds. It also has unburnt carbon.
#### 4. Question
The constituents of the coal combustion include:
How many of the above options is/are correct?
• (a) Only two
• (b) Only three
• (c) Only four
• (d) All five
Solution: d)
What is Fly Ash?
Popularly known as Flue ash or pulverised fuel ash, it is a coal combustion product.
Composition:
Composed of the particulates that are driven out of coal-fired boilers together with the flue gases.
Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2), aluminium oxide (Al2O3) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata.
Minor constituents include: arsenic, beryllium, boron, cadmium, chromium, hexavalent chromium, cobalt, lead, manganese, mercury, molybdenum, selenium, strontium, thallium, and vanadium, along with very small concentrations of dioxins and PAH compounds. It also has unburnt carbon.
Solution: d)
What is Fly Ash?
Popularly known as Flue ash or pulverised fuel ash, it is a coal combustion product.
Composition:
Composed of the particulates that are driven out of coal-fired boilers together with the flue gases.
Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2), aluminium oxide (Al2O3) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata.
Minor constituents include: arsenic, beryllium, boron, cadmium, chromium, hexavalent chromium, cobalt, lead, manganese, mercury, molybdenum, selenium, strontium, thallium, and vanadium, along with very small concentrations of dioxins and PAH compounds. It also has unburnt carbon.
• Question 5 of 5 5. Question Consider the following statements regarding Persistent organic pollutants (POPs). Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes. Persistent organic pollutants (POPs) do not travel longer distances and are concentrated in the locality where they are released. Most POPs are pesticides or insecticides, and some are industrial chemicals. How many of the above statements is/are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: b) Statement 2 is incorrect. Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes. They are toxic chemicals that adversely affect human health and the environment around the world. Because they can be transported by wind and water, most POPs generated in one country can and do affect people and wildlife far from where they are used and released. Most POPs are pesticides or insecticides, and some are also solvents, pharmaceuticals, and industrial chemicals. Some of the “dirty dozen” POPs identified by the Stockholm Convention include aldrin, chlordane, heptachlor, DDT and dioxins. Incorrect Solution: b) Statement 2 is incorrect. Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes. They are toxic chemicals that adversely affect human health and the environment around the world. Because they can be transported by wind and water, most POPs generated in one country can and do affect people and wildlife far from where they are used and released. Most POPs are pesticides or insecticides, and some are also solvents, pharmaceuticals, and industrial chemicals. Some of the “dirty dozen” POPs identified by the Stockholm Convention include aldrin, chlordane, heptachlor, DDT and dioxins.
#### 5. Question
Consider the following statements regarding Persistent organic pollutants (POPs).
• Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes.
• Persistent organic pollutants (POPs) do not travel longer distances and are concentrated in the locality where they are released.
• Most POPs are pesticides or insecticides, and some are industrial chemicals.
How many of the above statements is/are correct?
• (a) Only one
• (b) Only two
• (c) All three
Solution: b)
Statement 2 is incorrect.
Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes. They are toxic chemicals that adversely affect human health and the environment around the world. Because they can be transported by wind and water, most POPs generated in one country can and do affect people and wildlife far from where they are used and released.
Most POPs are pesticides or insecticides, and some are also solvents, pharmaceuticals, and industrial chemicals.
Some of the “dirty dozen” POPs identified by the Stockholm Convention include aldrin, chlordane, heptachlor, DDT and dioxins.
Solution: b)
Statement 2 is incorrect.
Persistent organic pollutants (POPs) are organic compounds that are resistant to degradation through chemical, biological, and photolytic processes. They are toxic chemicals that adversely affect human health and the environment around the world. Because they can be transported by wind and water, most POPs generated in one country can and do affect people and wildlife far from where they are used and released.
Most POPs are pesticides or insecticides, and some are also solvents, pharmaceuticals, and industrial chemicals.
Some of the “dirty dozen” POPs identified by the Stockholm Convention include aldrin, chlordane, heptachlor, DDT and dioxins.
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