English Comprehension PYQs

The correct answer is 1 only.

Key PointsUniversal Declaration of Human Rights

• The Universal Declaration of Human Rights (UDHR) was adopted by the United Nations General Assembly in 1948 as a common standard of achievements for all peoples and all nations.
• It sets out, for the first time, fundamental human rights to be universally protected and it has been translated into over 500 languages.
• The Declaration consists of 30 articles affirming an individual's rights. Those rights include civil and political rights, like the right to life, liberty, free speech, and privacy. They also include economic, social and cultural rights, like the right to social security, health, and education.
• **Regarding the first

Statement:

** The Declaration indeed states that everyone has the right to seek and to enjoy in other countries asylum from persecution. This right is particularly outlined in Article 14 of the UDHR. However, it does not specifically mention "political crimes" but rather persecution in general. Hence, statement 1 is correct.

• **Regarding the second

Statement:

** While the Declaration does affirm the right to change one’s nationality (Article 15), it does not explicitly provide a provision regarding freedom from arbitrary deprivation of nationality. The statement as presented misrepresents the scope of the Declaration. The emphasis is on the right to a nationality and the prohibition against arbitrary denial or deprivation of nationality, not specifically on the conditions mentioned. Hence, statement 2 is incorrect.

Additional Information

• Article 14 of the UDHR is significant because it was one of the first international recognitions of the right to asylum. This has paved the way for later treaties and international laws concerning refugees and asylum seekers.
• Article 15 of the UDHR highlights that everyone has the right to a nationality and that no one should be arbitrarily deprived of their nationality nor denied the right to change it. This article underpins the importance of nationality to an individual's sense of identity and legal recognition.
• The principles laid out in the UDHR are considered to be of fundamental importance in the international human rights regime, influencing numerous international treaties, national constitutions, and other protective laws.
• The Declaration, while not a legally binding document, has inspired more than 60 human rights instruments which together constitute an international standard of human rights.
• Among these subsequent instruments are the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights, which together with the Declaration form the so-called International Bill of Human Rights.

The correct answer is Cotton textiles.**

Key PointsImpact of Deindustrialisation on Indian Industries in the 19^th Century

• The 19^th century was a period of significant economic transformation in India, marked by the deindustrialisation of its traditional industries due to the colonial policies of the British Empire.
• Cotton textiles, one of India's ancient and flourishing industries, was severely impacted by deindustrialisation. This industry had a long-standing reputation for producing high-quality cotton products, which were in demand both domestically and internationally.
• British policies favoured the import of cotton fabrics from Britain to India, imposing heavy duties on Indian cotton goods and thus undermining the local industry. Hence, option 2 is correct.
• The iron and steel industry in India was not yet fully developed in the 19^th century, and thus, while affected, its impact was not as significant compared to the traditional industries like silk and cotton.
• Woolen manufacture in India was less prominent compared to silk and cotton, and thus, while affected, it did not face the level of impact seen in the silk industry.

Additional Information

• The process of deindustrialisation was characterized by the decline of India's traditional industries due to a combination of colonial exploitation, discriminatory tariffs, and the influx of cheaper British manufactured goods.
• Deindustrialisation had a profound impact on the Indian economy, leading to increased unemployment, loss of skilled artisans, and a shift towards agriculture as the primary source of livelihood for many, further exacerbating economic challenges.
• The British colonial rule systematically dismantled the Indian handloom industry to create a market for their manufactured goods, leading to a significant socio-economic shift and contributing to the economic underdevelopment of India during the colonial period.
• Understanding the impact of deindustrialisation is crucial for comprehending the broader historical context of economic policies under British colonial rule and their long-term effects on India's economic development.

The correct answer is 1 and 3 only.

Key Points

• The Industrial Revolution marked a significant shift in society from a predominantly agrarian and handicraft economy to one characterized by industrial and machine manufacturing processes.
• The first Industrial Revolution is noted for its major developments in industries such as textiles, iron, and the widespread use of the steam engine. This transformative period began in Great Britain in the late 18^th century, around the 1760s, making the statement about its beginning in Germany incorrect. Hence, statement 2 is incorrect.
• Technological advancements during the Industrial Revolution were indeed pivotal. Innovations in iron smelting significantly improved the production process, making it more efficient and cost-effective. Steel production later played a crucial role in the construction and machinery industries, among others. The invention and application of the steam engine revolutionized transportation and manufacturing, making it a hallmark of this era. Hence, statement 3 is correct.
• The change towards industrial society involved a shift where the majority of the population began earning their livelihood in the industrial sector, moving away from agricultural practices. This transition is a defining characteristic of the Industrial Revolution. Hence, statement 1 is correct.

Additional Information

• The Industrial Revolution led to urbanization, as people moved to cities in search of jobs in the new factories. This shift had profound social, economic, and environmental impacts.
• It introduced a new era of innovations such as the cotton gin, interchangeable parts, and the telegraph, which further propelled industrial growth and efficiency.
• The revolution also brought about significant changes in social structures, with the rise of a new working class and the development of new social classes associated with industrial capitalists.
• Environmental impacts were significant, with the increased use of fossil fuels contributing to pollution and the beginning of significant changes in global climates.
• It paved the way for the Second Industrial Revolution, which saw advancements in electricity, chemical manufacturing, and internal combustion engines, further transforming societies and economies worldwide.

The correct answer is Kirana Gharana.

Key PointsPrabha Atre and Kirana Gharana

• Prabha Atre was a renowned classical singer and an exponent of the Kirana Gharana, one of the most influential gharanas in Indian classical music.
• The Kirana Gharana is known for its emphasis on the blending of melodic and rhythmic aspects of music, focusing particularly on the elaboration of ragas.
• Prabha Atre's music was characterized by her innovative style and technical finesse, which she brought to the traditional compositions of the Kirana Gharana.
• She was a versatile performer, adept at both classical and semi-classical forms like Thumri and Bhajan.
• Her contribution to Indian classical music includes not only her performances but also her role as an educator and author, enriching the musical landscape with her knowledge and expertise.

Hence, the correct option is Kirana Gharana.

Additional Information

• The Kirana Gharana originated in the late 19^th century and is named after Kirana or Kairana, a town in Uttar Pradesh, India. It has produced many legendary musicians.
• This gharana's distinctive feature is its pure and emotional rendition of ragas, achieved through a fine blend of khayal singing and tantrakari (instrumental virtuosity).
• Prabha Atre's approach to music was deeply influenced by her gurus and the tradition of the Kirana Gharana, yet she brought her own creativity to her performances, making her a beloved figure in the Indian classical music community.
• She was awarded several prestigious awards for her contribution to Indian classical music, including the Padma Shri and Padma Bhushan, recognizing her as a leading figure in the promotion and preservation of Indian classical music.
• Prabha Atre's work in music education and literature includes writing books that serve as important resources for students and aficionados of Indian classical music, reflecting her dedication to spreading the knowledge and appreciation of this art form.

The correct answer is UNHCR.

Key Points

• UNHCR (United Nations High Commissioner for Refugees): The UNHCR has been awarded the Nobel Peace Prize twice:
• First in 1954
• Second in 1981 for their continued work to aid refugees for three decades.

Additional Information

• Explanation for Other Options:
• IPCC (Intergovernmental Panel on Climate Change): Awarded the Nobel Peace Prize once, in 2007.
• IAEA (International Atomic Energy Agency): Awarded the Nobel Peace Prize once, in 2005.
• UNICEF (United Nations International Children's Emergency Fund): Awarded the Nobel Peace Prize once, in 1965.

The correct answer is 2.

Key PointsThe Early Phase of the National Movement in India

• Ferozeshah Mehta, along with Badruddin Tyabji and others, indeed formed the Bombay Presidency Association. This organization was established in 1885, the same year as the Indian National Congress, and was a significant political organization in the Bombay Presidency. Hence, statement 1 is correct.
• Surendranath Banerjee was indeed instrumental in founding the Indian National Conference, which later merged with the Indian National Congress. This makes the second statement correct. Hence, statement 2 is correct.
• Allan Octavian Hume played a pivotal role in the founding of the Indian National Congress in 1885, with the intention of forming a platform for civic and political dialogue among educated Indians. Contrary to the claim in the third statement, Hume's aim was not to create a rival organisation but to establish a unified body to represent Indian interests, particularly those of the educated elite, not specifically the poor and marginalised. Hence, statement 3 is incorrect.

Additional Information

• The Bombay Presidency Association was one of the early political associations in British India, reflecting the growing political consciousness among the Indian elite.
• The Indian National Conference, established by Surendranath Banerjee, played a significant role in the formation of the Indian National Congress, which became the leading vehicle for India's struggle for independence.
• Allan Octavian Hume is often called the 'Father of the Indian National Congress' due to his role in its formation. His vision was to create a platform for the educated Indians to discuss and propose solutions to their problems and present them to the British Government.
• The Indian National Congress was not intended to be a party for the poor and marginalised at its inception. Over time, however, it evolved to include wider sections of the Indian society and became a principal player in the Indian freedom struggle, adopting various resolutions and movements against British rule.

The correct answer is 1 only.

Key PointsInsolation

• Insolation, or incoming solar radiation, refers to the solar energy that reaches the Earth's surface. It is a critical factor driving weather patterns and climate.
• The statement that insolation is predominantly short-wave radiation, with wavelengths in the range of 0.39 micrometre to 0.76 micrometre, is accurate. This range includes the visible spectrum, which is a significant portion of the solar radiation that reaches and warms the Earth. Hence, statement 1 is correct.
• The claim that insolation is evenly distributed across the Earth because of the Earth's curved surface is incorrect. The Earth's curvature, axial tilt, and orbital eccentricities result in uneven distribution of solar energy, with the equatorial regions receiving more insolation than polar regions. This uneven distribution is a fundamental cause of climate zones and seasonal changes. Hence, statement 2 is incorrect.

Additional Information

• Solar Radiation: The sun emits energy in the form of electromagnetic radiation. When this radiation travels through space and reaches the Earth's atmosphere and surface, it is referred to as solar radiation or insolation.
• Wavelengths of Solar Radiation: The solar spectrum includes not only visible light but also ultraviolet (UV) and infrared (IR) radiation. UV radiation has shorter wavelengths than visible light, whereas IR radiation has longer wavelengths.
• Effects of Insolation: The amount of insolation received by different parts of the Earth influences climate patterns, weather conditions, and the growth of vegetation. It is also a key factor in the Earth's energy balance, affecting temperature and atmospheric circulation.
• Seasonal Variations: The Earth's tilt and its orbit around the sun lead to variations in the angle at which the sun's rays strike the Earth, causing seasons. This results in significant changes in insolation over the course of a year for most locations.
• Latitude and Insolation: Insolation varies with latitude, with equatorial regions receiving more consistent and direct sunlight year-round compared to higher latitudes, which experience more pronounced seasonal variations.

The correct answer is K. M. Cariappa.

Key Points

• Field Marshal Kodandera Madappa Cariappa was the first Indian Commander-in-Chief of the Indian Army after independence.
• He took over as Commander-in-Chief of the Indian Army from General Sir Francis Butcher, the last British Commander-in-Chief of India, on 15 January 1949.
• This day is celebrated as Army Day in India every year in recognition of Field Marshal K.M. Cariappa's taking over as the first Commander-in-Chief of the Indian Army from General Sir Francis Butcher.
• Field Marshal Cariappa's leadership was instrumental in shaping the early years of the Indian Army post-independence.
• He is also one of the only two Indian Army officers to hold the highest rank of Field Marshal; the other being Field Marshal Sam Manekshaw.

Hence, the correct answer is K. M. Cariappa.

Additional Information

• The role of the Commander-in-Chief is critical in the defense architecture of a country, being the highest-ranking officer in the armed forces and responsible for the overall operational command.
• Field Marshal K.M. Cariappa’s tenure is remembered for his emphasis on discipline, secularism, and a professional approach towards the armed forces.
• He was known for his strict adherence to the principle of civilian control over the military, laying the foundation for a democratic and professional military ethos in independent India.
• Field Marshal Cariappa's legacy includes not only his military achievements but also his humanitarian approach, including his efforts towards the welfare of soldiers and his stance on human rights during military operations.
• The rank of Field Marshal is the highest rank in the Indian Army. It is a ceremonial or wartime rank, and as of the last update, has been conferred on only two officers.

The correct answer is 2 only.

Key Points

• Vaccinations work primarily by stimulating the immune system to produce antibodies without causing the disease itself.
• Blocking the entry of the infectious agent into the body is not a function of vaccines. Vaccines work after the infectious agent enters the body by preparing the immune system to recognize and fight the infectious agent.
• Hence, statement 1 is incorrect.
• Producing antibodies against infection is a core function of vaccines. By introducing a harmless component of the infectious agent or a blueprint for producing such components, vaccines train the immune system to recognize and combat the pathogen without causing the disease.
• Hence, statement 2 is correct.
• Killing the infectious agent when it enters the body is not the direct action of vaccines. While vaccines prepare the immune system to effectively fight the infectious agent, they do not directly kill pathogens. The immune response facilitated by vaccination is responsible for targeting and eliminating the infectious agent.
• Hence, statement 3 is incorrect.

Additional Information

• Types of Vaccines: There are several types of vaccines, including live attenuated vaccines, inactivated vaccines, subunit vaccines, toxoid vaccines, and mRNA vaccines.

Each type has a different method of preparing the immune system to fight the disease.

• Herd Immunity: When a significant portion of a population becomes immune to an infectious disease (through vaccination and/or previous infections), herd immunity is achieved. This provides a measure of protection for individuals who are not immune.
• Global Vaccination Efforts: Organizations like the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) play critical roles in promoting vaccination and providing guidelines for vaccine use worldwide to prevent outbreaks of infectious diseases.
• Immunization Schedules: Countries have specific immunization schedules for children and adults to protect against various infectious diseases. These schedules recommend the ages at which people should receive vaccinations to ensure optimal protection.
• Vaccine Safety: Vaccines undergo rigorous testing for safety and efficacy through multiple phases of clinical trials before they are approved for public use.

The correct answer is multiple parabolic antennas.

Key PointsThe Giant Metrewave Radio Telescope (GMRT)

• The GMRT is an array of thirty fully steerable gigantic parabolic dishes of 45 meters in diameter.
• These antennas are spread over distances of up to 25 kilometers and function together as a single large telescope.
• It utilizes radio frequencies in the range of 50 MHz to 1.5 GHz, making it one of the most versatile radio observatories.
• The GMRT is located near Pune, India, and is operated by the National Centre for Radio Astrophysics.
• It is one of the world's most powerful radio observatories for investigating various astronomical phenomena such as pulsars, quasars, supernovae, and galaxies.
• Despite the wording suggesting circular, the correct terminology in radio astronomy for the shape of the antennas is 'parabolic', which refers to the dish's shape that focuses the radio waves. Hence, option 2 is correct.

Additional Information

• The GMRT was conceptualized in the early 1980s, with construction beginning in the early 1990s and completed in 1997.
• Its design allows for upgrades, and it has undergone enhancements to improve sensitivity and operational frequency range, ensuring its continued relevance in astronomical research.
• The GMRT has contributed to several key discoveries, including the detection of the farthest known radio galaxy and insights into the nature of the early Universe.

 

General Information on Telescope Arrays

• A telescope array, like GMRT, uses multiple antennas working together, effectively operating as a single, larger telescope. This methodology, known as interferometry, significantly boosts observational capabilities.
• Telescope arrays combine signals from individual antennas to improve resolution and image quality, which is crucial for modern astronomical research.
• Examples of other notable radio telescope arrays include the Very Large Array (VLA) in New Mexico, USA, and the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile.

The correct answer is 1, 2 and 3.

Key Points

• Meanders are sinuous bends or curves in a river channel, which form naturally as a river erodes the landscape in snake-like paths.
• While a U-shaped description is simplistic, meanders are indeed characterized by their winding or bending form, which can resemble a series of U-shapes or large loops along a river course. Hence, statement 1 is correct.
• An extremely tight meander, sometimes resembling a neck of a goose, hence termed a gooseneck, is prone to the natural process of cutoff, particularly during floods. This process creates an oxbow lake, which is a U-shaped water body left behind when the river finds a shorter course, bypassing the meander. Hence, statement 2 is correct.
• Tectonic uplift can indeed influence a river's behavior. When an area undergoes uplift, it can alter the river's gradient, prompting it to carve deeper into its bed rather than meandering across a floodplain. This process can lead to the formation of incised or entrenched meanders, where meanders cut deeply into the underlying terrain. Hence, statement 3 is correct.

 Additional Information

• Meander formation is primarily driven by the lateral erosion and deposition along the outer and inner banks of the river bend, respectively.
• The stream velocity is higher along the outer edge of a bend due to greater water depth, leading to more erosion; conversely, the inner edge experiences slower velocities, prompting sediment deposition.
• Oxbow lakes are important for biodiversity, serving as habitats for various aquatic and bird species, even as they represent a snapshot in the dynamic process of fluvial geomorphology.
• Incised meanders serve as a testament to the river's history, capturing the interplay between climatic, tectonic, and hydrological factors over geological time scales.
• The study of river meanders and their evolution is crucial in hydrology, river engineering, and environmental science, informing flood management practices and river restoration projects.

The correct answer is SAMBHAV.

Key Points

• SAMBHAV is an end-to-end secure mobile ecosystem developed by the Indian Army.
• It ensures that communication within the army is secure and encrypted to prevent any unauthorized access.
• SAMBHAV is designed to provide a secure means of communication for the Indian Army personnel.
• It is a step towards self-reliance in defense technology for the Indian Armed Forces.

Additional Information

• SANCHAR: SANCHAR is not related to the Indian Army's secure mobile ecosystem. It generally refers to communication but is not specific to any military application.
• VAIBHAV: VAIBHAV is an initiative that stands for "Vaishvik Bhartiya Vaigyanik" (Global Indian Scientists) and is not related to the Indian Army's secure mobile ecosystem.
• SAMPARK: SAMPARK is generally associated with communication or interaction but is not the name of the secure mobile ecosystem developed by the Indian Army.

The correct answer is Red blood cells.

Key PointsCharacteristics of Red Blood Cells (RBCs)

• Red blood cells, also known as erythrocytes, are distinctive among human body cells as they lack a nucleus in their mature form.
• These cells are responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide back to the lungs for exhalation.
• RBCs have a unique biconcave shape that increases their surface area for oxygen exchange and allows them to deform as they navigate through the body's capillaries.
• The absence of a nucleus and other organelles in mature red blood cells provides more space for hemoglobin, the protein that binds oxygen. This specialization enhances their oxygen-carrying capacity.
• The lifespan of an RBC is about 120 days. After this, they are broken down and recycled by the spleen and liver.
• Red blood cells are produced in the bone marrow through a process called erythropoiesis, controlled by the hormone erythropoietin.
• Anemia can result from a decrease in RBC count or hemoglobin, leading to reduced oxygen transport to the body's tissues. Hence, statement 3 is correct.

Additional Information

• Muscle cells contain nuclei and are specialized for contraction. Skeletal muscle cells, for instance, are multinucleated.
• Phagocytic cells, such as macrophages, play a crucial role in the body's immune response by ingesting harmful pathogens. These cells have a nucleus.
• Ciliated cells are characterized by the presence of cilia on their surface and are found in various parts of the body, such as the respiratory tract, where they help move mucus and trapped particles out of the lungs. Ciliated cells also contain a nucleus.
• The process of erythropoiesis is stimulated by low oxygen levels in the blood, detected by the kidneys, which then secrete erythropoietin to increase RBC production.
• Hemoglobin within RBCs not only transports oxygen but also plays a role in the transport of carbon dioxide and hydrogen ions, which are crucial for maintaining the body's acid-base balance.

The correct answer is Axiom Station.

Key Points

• The Axiom Station is set to become the first commercial space station, marking a significant milestone in the commercialization of space.
• Unlike the International Space Station (ISS), which is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada), Axiom Station is being developed by a private company, Axiom Space.
• Axiom Space's vision includes not only providing research and manufacturing facilities in low Earth orbit but also promoting space tourism and eventually serving as a hub for missions to deeper space.
• The station is planned to attach initially to the ISS, leveraging the existing infrastructure, before eventually becoming a fully independent, commercial space station.
• Galileo and Voyager 1 are unrelated to commercial space stations; Galileo is a global navigation satellite system (GNSS) used for positioning, while Voyager 1 is a space probe launched by NASA to study the outer Solar System and interstellar space.

Hence, the correct option is Axiom Station.

Additional Information

• The International Space Station (ISS) has been in operation since 1998 and represents the longest continuous human presence in low Earth orbit, serving as a model for international cooperation in space.
• Axiom Space's initiative to build a commercial space station highlights the growing trend of private-sector participation in space exploration, a domain that was traditionally dominated by government space agencies.
• Commercial space stations like Axiom Station are expected to play a crucial role in the future of space exploration, including providing platforms for scientific research, manufacturing in microgravity conditions, and facilitating commercial space tourism.
• The development of commercial space habitats is also seen as a stepping stone for human colonization of other planets, with companies and researchers exploring how to sustain human life in space for extended periods.
• Space tourism is becoming an increasingly tangible reality, with companies such as SpaceX, Blue Origin, and Virgin Galactic working towards making space accessible to non-professional astronauts.

The correct answer is Option 3.**

Key PointsUnderstanding Relative Humidity

• Relative humidity is a way of describing how much humidity is present in the air, compared to how much there could be at a particular temperature.
• Temperature is crucial because the capacity of air to hold water vapor increases as the air gets warmer. This means that relative humidity changes with temperature even if the amount of moisture in the air remains constant.
• Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).
• To calculate relative humidity, one needs to know both the current absolute humidity and the maximum possible absolute humidity at the current temperature. The formula for relative humidity is: Relative Humidity = (Absolute Humidity / Maximum Possible Absolute Humidity) * 100.
• Therefore, both the temperature and absolute humidity are required to determine the relative humidity. Knowing only one of these variables is insufficient because you cannot calculate how saturated the air is with water vapor without both pieces of information. Hence, statement 3 is correct.

Additional Information

• Measurement of Humidity: Devices such as hygrometers and psychrometers are used to measure humidity. A hygrometer measures the humidity directly, while a psychrometer uses the difference between two temperature readings (dry bulb and wet bulb) to calculate humidity.
• Importance of Humidity: Humidity plays a significant role in weather patterns and can affect human comfort and health, agricultural conditions, and the preservation of materials.
• Dehumidifiers and Humidifiers: These devices are used to control the level of humidity in indoor environments. A dehumidifier removes excess moisture from the air, while a humidifier adds moisture to the air, helping to maintain a comfortable and healthy indoor atmosphere.
• Weather Forecasting: Understanding humidity is essential for predicting weather conditions, such as rain, snow, fog, and dew. Meteorologists use measurements of temperature, absolute humidity, and relative humidity in their forecasts.
• Heat Index: The heat index or "feels-like" temperature takes into account both the air temperature and the relative humidity to determine how hot the weather feels to the human body. High relative humidity reduces the body's ability to cool itself through evaporation of perspiration, making it feel hotter than the actual air temperature.

The correct answer is Both 1 and 2.

Key PointsRegional Comprehensive Economic Partnership (RCEP)

• The Regional Comprehensive Economic Partnership (RCEP) is a free trade agreement in the Asia-Pacific region between the ten ASEAN member states and five of their FTA partners.
• ASEAN member states include Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand, and Vietnam.
• The five ASEAN FTA partners involved in RCEP are Australia, China, Japan, New Zealand, and South Korea.
• India was originally part of the negotiations but opted out in 2019 citing concerns that reducing tariffs across the board would harm its domestic producers by opening them up to a flood of cheap imports.
• RCEP aims to standardize trade-related rules, reduce tariffs and non-tariff barriers, and enhance economic cooperation among its members.
• RCEP is significant as it covers nearly a third of the global population and accounts for almost 30% of global GDP, making it one of the world's largest trading blocs.
• Hence, statement 1 is correct.
• Hence, statement 2 is correct.

Additional Information

• The objectives of RCEP include enhancing economic integration and fostering trade among the participating countries, contributing to the growth and development of the region.
• For India, concerns over RCEP included not just the potential for increased imports but also issues related to non-tariff barriers and the need for better market access for its services.
• RCEP negotiations were formally launched in November 2012 at the ASEAN Summit in Cambodia and concluded in November 2020.
• The agreement is seen as a counterbalance to the influence of the United States in the region, especially after the U.S. withdrew from the Trans-Pacific Partnership (TPP).
• While India is not a part of RCEP, it has the option to join the agreement in the future if it decides that the terms are favorable or if its concerns are addressed satisfactorily.

The correct answer is They are non-biodegradable.

Key Points

• Plastics are synthetic or semi-synthetic materials that are durable and resistant to many natural processes of degradation, making them non-biodegradable.
• Their resistance to biodegradation results in a long-lasting presence in the environment, contributing to pollution on land and in water bodies.
• This property leads to significant environmental problems, including soil and water pollution, harm to marine and wildlife, and the accumulation of non-decomposable waste in landfills.
• The chemical structure of plastics is such that microorganisms in the environment cannot easily break them down, resulting in their accumulation over time.

The correct answer is  Silver.

Key PointsFerromagnetic Materials

• Ferromagnetism is a physical phenomenon in which a material can exhibit a spontaneous magnetization, and it is one of the strongest forms of magnetism.
• Materials that are known to be ferromagnetic include Iron (Fe), Cobalt (Co), and Nickel (Ni) along with some of their alloys and certain rare earth metals.
• Ferromagnetic materials have domains in which the magnetic moments are aligned in the same direction. When these materials are placed in an external magnetic field, these domains become aligned, making the material magnetized.
• Silver, however, is not ferromagnetic. Silver is classified as a diamagnetic material, which means it tends to become magnetized in a direction opposite to that of the magnetic field applied but with a very weak intensity. Therefore, it does not retain magnetization in the absence of an external magnetic field.
• Ferric chloride, although not a pure metal, can exhibit magnetic properties due to the presence of iron, but it is not inherently a strong ferromagnetic material like pure Iron, Cobalt, or Nickel.
• Hence, Silver is not a ferromagnetic material.

Additional Information

• In the context of electromagnetism, materials are broadly classified into several types based on their magnetic properties: ferromagnetic, paramagnetic, diamagnetic, and antiferromagnetic materials.
• Ferromagnetic materials are highly attracted to magnets and can become permanent magnets themselves when exposed to a magnetic field.
• Paramagnetic materials, like aluminum and platinum, are weakly attracted to magnets and do not retain magnetic properties once the external field is removed.
• Diamagnetic materials, such as silver and gold, are weakly repelled by both poles of a magnet and do not retain any magnetization.
• Antiferromagnetic materials have magnetic moments that are aligned in opposite directions, resulting in no overall magnetization.
• The study of these materials and their properties is crucial in various applications, including electronics, data storage, medical imaging, and automotive sensors.

The correct answer is CFC

Key PointsGreenhouse Gases and Their Atmospheric Residence Time

• Chlorofluorocarbons (CFCs) are synthetic compounds consisting of carbon, chlorine, and fluorine. They were once widely used in industrial applications, including as refrigerants, solvents, and foam blowing agents.
• CFCs are known for their role in ozone depletion as well as their greenhouse gas effects. They absorb infrared radiation, trapping heat in the atmosphere, which contributes to global warming.
• The average residence time of CFCs in the atmosphere is significantly longer. They can stay in the atmosphere for up to 50 to 500 years before decomposing or being removed.
• Comparatively, other greenhouse gases such as methane (CH₄) and nitrous oxide (N₂O) have shorter atmospheric lifetimes. Methane has an average residence time of approximately 12 years, while nitrous oxide remains in the atmosphere for about 114 years.
• Water vapor, though a potent greenhouse gas, has a relatively short residence time in the atmosphere, typically ranging from a few days to a couple of weeks, depending on the prevailing climatic conditions.

Hence, the statement that CFC has the maximum average residence time in the atmosphere is correct.

Additional Information

• The Montreal Protocol on Substances that Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances, including CFCs, responsible for ozone depletion.
• While CFCs have a high global warming potential (GWP), efforts to reduce their use have been successful in mitigating both ozone depletion and their contribution to global warming.
• The role of greenhouse gases in global warming is critical, as their presence in the atmosphere regulates Earth's temperature. However, excessive concentrations, particularly of long-lived gases like CFCs, can lead to a significant and harmful increase in global temperatures.
• Understanding the atmospheric residence time of greenhouse gases is essential for predicting their long-term effects on global climate patterns and for developing strategies to mitigate climate change.

The Correct answer is Argentina.

Key Points

• The Government of India has entered into an agreement with Argentina for a lithium exploration and mining project.
• This agreement is part of India's strategy to secure critical minerals and diversify its sources of lithium.
• Argentina is one of the leading countries in the world with significant lithium reserves, particularly in the Lithium Triangle region.
• The agreement aims to enhance bilateral cooperation between India and Argentina in the mining sector.
• India is looking to boost its electric vehicle (EV) industry and renewable energy projects, which require a steady supply of lithium for batteries.
• This collaboration is expected to help India meet its domestic lithium demand and reduce dependence on other countries.

 Additional Information

• Brazil
• Brazil is known for its rich natural resources, including significant deposits of iron ore, gold, and bauxite.
• It is not a leading country in lithium reserves compared to Argentina.
• Brazil has strong agricultural and mining sectors, contributing significantly to its economy.
• Australia
• Australia is a major global player in the mining industry, particularly known for its extensive lithium reserves.
• It is one of the world's largest producers of lithium, primarily from the Greenbushes lithium mine in Western Australia.
• Australia has well-established mining infrastructure and technology for lithium extraction.
• Chile
• Chile is part of the Lithium Triangle in South America, alongside Argentina and Bolivia, and has vast lithium reserves.
• It is one of the world's largest producers of lithium, with significant operations in the Salar de Atacama.
• Chile's lithium is crucial for the global supply chain of batteries and electric vehicles.