Environment

Statement 1 is Incorrect: Copper smelting plants are not typically associated with the release of lethal quantities of carbon monoxide into the environment; the primary gaseous pollutant of concern is sulfur dioxide. Statement 2 is Correct: Copper slag is a byproduct of the smelting process that contains heavy metals such as arsenic, lead, and cadmium. These metals can leach into the environment, potentially contaminating soil and groundwater resources. Statement 3 is Correct: Copper smelting plants are a major source of sulfur dioxide (SO2) emissions. This occurs because most copper ores are sulfide minerals (like chalcopyrite), and the sulfur within the ore is oxidized and released as SO2 gas during the roasting and smelting processes.

The Phosphorus Cycle is unique among major biogeochemical cycles because it does not involve a gaseous phase. Instead, phosphorus primarily moves through the lithosphere (rocks), hydrosphere (water), and biosphere (organisms).

- Weathering of Rocks: The main source of phosphorus in this cycle comes from the weathering of phosphate-rich rocks. Over time, geological processes break down these rocks, releasing phosphate ions (PO₄³⁻) into the soil and water. - Absorption by Plants: Plants absorb phosphorus from the soil, and it moves up the food chain as herbivores and carnivores consume plants and other organisms. - Return to the Soil: When organisms die, decomposition releases phosphorus back into the environment, where it can re-enter the cycle. 

- Carbon Cycle: The main source of carbon is atmospheric CO₂, released by respiration, combustion, and volcanic activity. 

- Nitrogen Cycle: Nitrogen is primarily cycled through the atmosphere, with nitrogen fixation (by bacteria) being a key process. 

- Sulphur Cycle: Sulfur is mainly released from volcanic eruptions, decaying organic matter, and fossil fuel combustion, rather than rock weathering. 

Statement 1 is Correct: The friction and mechanical wear between brake pads and discs in motor vehicles generate iron-rich particulate matter, which can oxidize to form magnetite nanoparticles.

Statement 2 is Correct: High-temperature combustion within vehicle engines produces magnetite as a byproduct of fuel burning and engine component wear, which is then released as an environmental pollutant.

Statement 3 is Incorrect: Microwave stoves use electromagnetic radiation to heat food; they do not involve combustion or mechanical abrasion that would release magnetite particles into the environment.

Statement 4 is Correct: Power plants, especially coal-fired ones, are significant sources of magnetite. The high-temperature combustion of fossil fuels produces fly ash that contains magnetic iron oxides.

Statement 5 is Incorrect: Telephone lines carry electrical or optical signals and generate electromagnetic fields, but they do not undergo processes that emit physical magnetite particles.

* The R2 Code of Practices is a tool available for promoting the adoption of environmentally responsible practices in the electronics recycling industry.

* R2 stands for Responsible Recycling. The Code of Practices outlines a set of standards that electronics recyclers should follow to ensure responsible handling of electronic waste.

Statement 1 is correct. Furnace oil is indeed a product of oil refineries. It is a dark viscous residual fuel obtained by blending heavier components of crude oil.

Statement 2 is correct. Furnace oil is widely used in industries like cement, steel, and textiles for power generation and heating. It is burned in boilers, furnaces, and engines to produce energy.

Statement 3 is correct. Furnace oil contains high sulfur content, and its combustion releases sulfur oxides (SOₓ), contributing to air pollution and acid rain.

Statement 1 is correct: Permaculture farming indeed discourages monocultural practices, promoting biodiversity and the efficient use of available resources. On the other hand, conventional chemical farming often involves monoculture practices.

Statement 2 is correct: Conventional chemical farming can lead to an increase in soil salinity due to the heavy use of synthetic fertilizers and pesticides, while permaculture farming promotes soil health and does not contribute to soil salinity.

Statement 3 is incorrect: The statement about conventional chemical farming being easily possible in semi-arid regions but permaculture farming not being so easily possible in such regions is not necessarily true. Permaculture farming can be adapted to various climates and environments, including semi-arid regions, by using appropriate design principles and techniques.

Statement 4 is correct: The practice of mulching, which involves covering the soil with organic material to conserve moisture, suppress weeds, and improve soil health, is an important aspect of permaculture farming, but it is not necessarily a key practice in conventional chemical farming.

Statement 1 is incorrect: Hyderabad was indeed recognized as a Tree City of the World, but not by the UNCDF and Arbor Day Foundation together. The recognition comes from a joint program by the UN Food and Agriculture Organization (FAO) and the Arbor Day Foundation.

Statement 2 is correct: Hyderabad was selected as a 2020 Tree City of the World by the Arbor Day Foundation in recognition of the city's commitment to urban forestry, including growing and maintaining its urban forests.

Therefore, only the second statement is correct, and the first statement is incorrect.

Triclosan (sometimes abbreviated as TCS) is an antibacterial and antifungal agent present in some consumer products, including - toothpaste, - soaps, - detergents, - toys, - surgical cleaning treatments.

The correct statements about the New York Declaration on Forests are: 1. It was first endorsed at the United Nations Climate Summit in 2014. 2. It does endorse a global timeline to end the loss of forests, aiming for significant reduction by 2020 and ending deforestation by 2030. 4. It is endorsed by a multi-stakeholder group, including governments, companies (big and small), and indigenous communities.

Incorrect statements: 3. The New York Declaration on Forests is not a legally binding international declaration. It's a voluntary political declaration. 5. The Declaration is currently endorsed by over 190 entities but it is not endorsed by India.

Therefore, the correct answer is A. 1, 2, and 4.

"Blue Carbon" designates carbon that is fixed via coastal ocean ecosystems , rather than traditional land ecosystems, like forests .

Although the ocean's vegetated habitats cover less than 0.5% of the seabed, they are responsible for more than 50%, and potentially up to 70%, of all carbon storage in ocean sediments.

* Bisphenol A (BPA) is a key component in the manufacture of polycarbonate plastics.

* Polycarbonate plastics are a type of synthetic plastic material that is known to contain Bisphenol A (BPA) as a structural component.

* BPA is used in the production of polycarbonate plastics, which are commonly used in various consumer products such as Water bottles, Food storage containers, Household electronics, Eyeglass lenses, Compact discs (CDs) and digital versatile discs (DVDs)

* BPA has raised health concerns due to its potential to act as an endocrine disruptor, which can interfere with the body's hormonal system.

Hedgehogs: Hedgehogs are small mammals have a unique defense mechanism where they roll up into a tight ball, using their sharp spines as a form of protection against predators. 

Marmots: Marmots do not roll up to protect themselves. Instead, they typically rely on burrows and their ability to give warning calls to avoid predators. 

Pangolins: Similar to hedgehogs, pangolins also roll up into a ball when threatened. They use their tough keratin scales as armor to protect their vulnerable parts. 

The Common Carbon Metric (CCM) is a protocol developed by the United Nations Environment Program's Sustainable Buildings & Climate Initiative (UNEP-SBCI) for measuring energy use and reporting greenhouse gas (GHG) emissions from building operations.

Its purpose is to support GHG emissions reductions through accurate measurement of energy efficiency. It is a universal method of measuring a building's carbon footprint and allows emissions from buildings around the world to be consistently assessed and compared.

Therefore, it is used for assessing the carbon footprint of building operations around the world.

* Filter feeders are a subgroup of suspension-feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialised filtering structure.

* Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. * Oyster is one of the filter feeders.

Pearl Farming - Pearls are the only gemstones in the world that come from a living creature. Mollusks such as oysters and mussels produce these precious jewels. - Pearl culture practices are present in Gujarat, Maharashtra, Bihar, Odisha, Kerala, Rajasthan, Jharkhand, Goa, and Tripura.

* The Wildlife Protection Act, 1972, provides for the protection of wild animals, birds, and plants. It classifies species into six schedules, each offering different levels of protection.

* Schedule VI of the Act pertains to certain plants that are prohibited from cultivation and planting without a license. Therefore, If a plant species is listed under Schedule VI, it means a license is required for its cultivation.


* The Wild Life (Protection) Amendment Act, 2022 amended the Wild Life (Protection) Act, 1972. The amendment reduced the number of schedules from six to four, simplifying wildlife classification and protection levels. Additionally, the Act also aligned the provisions with CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) by introducing a separate schedule (Sch. IV) for species covered under CITES.

Solar pumps provide a clean, energy-efficient, and sustainable alternative to traditional electric and fuel-driven pump sets. They play a crucial role in environmentally friendly agriculture and can be implemented in both developed and underdeveloped regions. The main components in a solar pumping system include a photovoltaic (PV) array, an electric motor and a pump. Solar water pumping systems are classified as either direct current (DC) or alternating current (AC) systems based on the motors ability. Recently, the concept of brushless DC (BLDC) motors for solar pumping water applications was presented as well.

Statement 1 is incorrect: Solar power can be used to run both surface pumps and submersible pumps. The type of pump does not limit the use of solar power.

Statement 2 is incorrect: Solar power can be used to run both centrifugal pumps and piston pumps. The type of pump, whether it's a centrifugal pump or a piston pump, does not limit the use of solar power.

Hence, both statements 1 and 2 are incorrect.

The question is asking about the raw materials that can be used for the production of biofuels according to India's National Policy on Biofuels.

Cassava is a starch-rich root vegetable that can be used to produce biofuel.

Damaged wheat grains, which are unfit for human consumption, can also be used to produce biofuel.

Groundnut seeds are not mentioned in the National Policy on Biofuels as a raw material for biofuel production.

Horse gram is also not mentioned in the National Policy on Biofuels as a raw material for biofuel production.

Rotten potatoes, which are unfit for human consumption, can be used to produce biofuel.

Sugar beet is a plant whose root contains a high concentration of sucrose and it is grown commercially for sugar production. It can also be used to produce biofuel.

Therefore, according to India's National Policy on Biofuels, Cassava, Damaged wheat grains, Rotten potatoes, and Sugar beet can be used as raw materials for the production of biofuels.

Statement 1 is correct: Female elephants, particularly older and more experienced ones, often lead the herd, while males may roam alone or form bachelor groups.

Statement 2 is correct: The gestation period for elephants is indeed one of the longest among mammals, ranging from about 18 to 22 months.

Statement 3 is incorrect: Female elephants can continue to reproduce well into their 40s and sometimes even into their 50s, although their reproductive capability tends to decrease with age.

Statement 4 is incorrect: Kerala does have a significant elephant population, but the highest elephant population in India is typically found in the state of Karnataka, followed by Assam.


Askot Wildlife Sanctuary (Uttarakhand): Musk deer are found in the high altitudes of the Himalayan region. Askot Wildlife Sanctuary, located in Uttarakhand, is specifically known for conserving the musk deer and its habitat.

Gangotri National Park (Uttarakhand): Gangotri National Park, also located in Uttarakhand, is another high altitude region where musk deer can be found.

Kishanpur Wildlife Sanctuary (Uttar Pradesh): This sanctuary primarily consists of terai grasslands and does not provide a suitable habitat for musk deer.

Manas National Park (Assam): This park is located in the northeastern plains and is home to species like tigers, rhinos, and elephants, but not musk deer.

Therefore, the most likely places to find the musk deer in its natural habitat are Askot Wildlife Sanctuary and Gangotri National Park.

* Critical Tiger Habitats (CTH), also known as core areas of tiger reserves, are identified under the Wild Life Protection Act, 1972 based on scientific evidence that such areas are required to be kept as inviolate for the purpose of tiger conservation.

* Among the options given, Nagarjunsagar-Srisailam Tiger Reserve has the largest area under 'Critical Tiger Habitat'. It spreads over five districts and the total area of the tiger reserve is 3,728 sq. km.

1. Copper slag is a by-product generated during the extraction and refining of copper. It can be used as a partial replacement for sand in concrete production, thus reducing the demand for natural resources. This reduces the environmental impact associated with sand mining.

2. Cold mix asphalt technology involves producing asphalt mixtures at lower temperatures compared to traditional hot mix asphalt. This results in reduced energy consumption during production and lower emissions of greenhouse gases. Cold mix asphalt also allows for the use of recycled materials, further enhancing its environmental sustainability.

3. Geotextiles are synthetic materials used in road construction for various purposes such as soil stabilisation, drainage, and erosion control. They can help in reducing the need for excessive excavation and use of natural resources like stone and gravel, thereby minimizing environmental impact.

4. Hot mix asphalt technology involves producing asphalt mixtures at high temperatures. While it provides excellent performance properties for roads, it typically requires higher energy consumption during production compared to cold mix asphalt technology.

5. Portland cement is a key ingredient in concrete production. While it is widely used in construction, its production process is energy-intensive and emits significant amounts of carbon dioxide, contributing to greenhouse gas emissions.

Therefore, the correct answer is A. 1, 2, and 3 only.

Statement 1 is correct: Coal ash, a by-product of coal combustion in power plants, contains various heavy metals including arsenic, lead, and mercury. These metals can pose environmental and health hazards. These toxic elements can leach into water bodies and contaminate soil.

Statement 2 is correct: The combustion of coal in power plants releases releases sulfur dioxide (SO₂), which contributes to acid rain and respiratory issues. It also emits oxides of nitrogen (NOₓ), which play a major role in smog formation and air pollution.

Statement 3 is correct: Indian coal, particularly the variety found in the eastern and central regions, is known for its high ash content (30-50%), which reduces its calorific value and increases pollution levels.Due to its high ash content, Indian thermal power plants generate large quantities of fly ash.

Therefore, all three statements are correct.

Statement 1 is correct: Desert National Park is located in Rajasthan and is one of the largest national parks in India, covering an area of around 3,162 km². It represents the Thar Desert ecosystem, featuring sand dunes, rocky terrain, and sparse vegetation. The park is spread across Jaisalmer and Barmer districts of Rajasthan.

Statement 2 is incorrect: Unlike some protected areas, human settlements exist within Desert National Park. Several villages and communities, including those engaged in livestock rearing, are located inside the park.

Statement 3 is correct: The park is one of the last strongholds of the Great Indian Bustard (Ardeotis nigriceps), which is critically endangered. Conservation efforts, including captive breeding programs, are ongoing to protect this bird. Therefore, the correct answer is that statements 1 and 3 are correct.

* The Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet, and White-throated redstart are all species of birds.

* The Ceylon frogmouth is a species native to the Western Ghats and parts of Sri Lanka. Known for its unique frog-like appearance and nocturnal habits, it thrives in dense forests.

* The Coppersmith barbet is a small, colorful bird found across the Indian subcontinent and parts of Southeast Asia. It is named after the sound it makes, which resembles the sound of a coppersmith striking metal.

* The Gray-chinned minivet is a species commonly found in the Indian subcontinent and Southeast Asia. This bird is known for its vibrant plumage and its presence in hilly, forested areas.

* The White-throated redstart is a striking bird found in regions of Nepal, Bhutan, central China, and the far northern parts of Myanmar and Northeast India. It is known for its contrasting black and white plumage and bright red tail feathers.

Biochar is a solid product obtained during the pyrolysis of biomass. It is a porous, carbon-rich material that has a wide range of uses, with soil improvement, remediation, and pollution control playing the most significant roles. In agriculture, biochar is primarily used to increase crop nutrition, plant growth, and soil fertility.

Statement 1 is correct. Biochar can indeed be used as a part of the growing medium in vertical farming. It helps in improving the soil structure and fertility, thereby promoting plant growth.

Statement 2 is correct. Biochar promotes the growth of nitrogen-fixing microorganisms. These microorganisms play a crucial role in the nitrogen cycle by converting atmospheric nitrogen into a form that plants can use.

Statement 3 is correct. Biochar also enables the growing medium to retain water for a longer time. Its porous nature allows it to hold onto water and nutrients, making them readily available for plant roots.

Therefore, all three statements are correct.

Benzene is a colorless or light yellow liquid at room temperature and is a well-known environmental pollutant. It is widely present in the environment due to various natural and human-made sources..

1. Automobiles, especially those running on petrol, are a significant source of benzene pollution. Since benzene is a component of petroleum products, including motor fuels, its combustion in vehicle engines releases benzene into the air, contributing significantly to air pollution.

2. Tobacco smoke is a source of benzene exposure. Both active smoking and passive smoking introduce benzene into the body, as tobacco smoke contains benzene. Prolonged exposure to such smoke increases health risks.

3. Wood burning releases benzene and other pollutants like polycyclic aromatic hydrocarbons (PAHs) due to incomplete combustion. Hence, wood burning is a source of benzene pollution.

4. Varnished wooden furniture can be a source of benzene exposure but it is less direct and typically with lower exposure levels once the varnish has cured. Therefore, it is not considered a significant source of benzene pollution.

5. Polyurethane-based products do not contribute significantly to benzene pollution. They are more associated with volatile organic compounds (VOCs) and other chemicals rather than benzene itself.

Thus, the major contributors to benzene pollution are automobile emissions, tobacco smoke, and wood burning . Hence the correct answer is A. 1, 2 and 3 only.

Southern swamp deer/ hard ground swamp deer, a unique sub-species of Barasingha, also known as the Indian swamp deer, is a herbivorous species that feeds exclusively on grasses (graminivorous) and is well adapted to is adapted to hard ground in open sal forest.


Kanha National Park is well-known for the conservation of hard ground swamp deer. Conservation efforts by the park have helped revive its numbers from near extinction.

Therefore, the correct answer is Kanha National Park.

Nagarhole National Park is located in the Kodagu and Mysore districts of Karnataka and is part of the Nilgiri Biosphere Reserve. It is indeed located in the Cauvery basin.

Papikonda National Park is not located in the Cauvery basin. It is actually located in the Godavari basin.

Sathyamangalam Tiger Reserve lies on the banks of the River Bhavani, a tributary of the River Cauvery in the foothills of the Eastern Ghats. So, it is located in the Cauvery basin.

Wayanad Wildlife Sanctuary: The Kabini river, a tributary of the Cauvery river, flows through the Wayanad Wildlife Sanctuary. Hence, it is also located in the Cauvery basin.

So, the correct answer includes Nagarhole National Park, Sathyamangalam Tiger Reserve, and Wayanad Wildlife Sanctuary.

The term 'Social Cost of Carbon' is a measure of the economic damages, in dollars, that would result from emitting one additional ton of carbon dioxide into the atmosphere.

It is used to value the climate impacts of rulemakings and helps policymakers understand the economic impacts of decisions that would increase or decrease emissions.

Therefore, it is best described as the long-term damage done by a tonne of carbon dioxide emissions in a given year.

Statement 1 is Correct: The Asiatic lion is naturally found only in India, with its wild population restricted to the Gir National Park and surrounding areas in Gujarat. It is currently listed as Endangered on the IUCN Red List.

Statement 2 is Incorrect: The double-humped camel (Bactrian camel) is naturally found in the steppes of Central Asia, particularly in Mongolia and China. While a population exists in the Nubra Valley of Ladakh, India, its natural range extends across Central Asia.

Statement 3 is Incorrect: The one-horned rhinoceros is naturally found in India (primarily in Assam, West Bengal, and Uttar Pradesh) and Nepal. Since it is native to both countries, it is not found naturally in India only.