WBSSC Group D Official Paper (Held On: 19 Feb, 2017) (Previous Year Paper)

The correct answer is Autotrophic.

Key Points

• Humans are heterotrophic organisms, meaning they depend on other organisms for their food and cannot produce it themselves.
• Unlike autotrophs (e.g., plants), humans do not have chlorophyll and cannot perform photosynthesis, the process of converting sunlight into energy.
• Humans are classified as omnivores, as they consume both plant-based and animal-based food.
• The term "autotrophic" refers to organisms like plants, algae, and some bacteria that produce their own food using sunlight, water, and carbon dioxide.
• Humans rely on consuming organic matter, which categorizes them as heterotrophs, not autotrophs.

Additional Information

• Autotrophs: Organisms that produce their own food through photosynthesis or chemosynthesis (e.g., plants, algae, and some bacteria).
• Heterotrophs: Organisms that cannot synthesize their own food and depend on other organisms for nutrition (e.g., humans, animals, fungi).
• Omnivores: Organisms that consume both plant and animal materials for energy and nutrients (e.g., humans, bears).
• Carnivores: Organisms that primarily eat other animals (e.g., lions, tigers).
• Photosynthesis: The process in autotrophs where sunlight, carbon dioxide, and water are converted into glucose and oxygen, enabling energy production.

The correct answer is Vitamin A.

Key Points

• Night blindness, also known as nyctalopia, is primarily caused due to a deficiency of Vitamin A.
• Vitamin A plays a critical role in the production of rhodopsin, a pigment in the retina that is essential for low-light vision.
• Sources of Vitamin A include carrots, sweet potatoes, spinach, liver, and fortified foods.
• Night blindness can be an early symptom of more severe Vitamin A deficiency, which may lead to complete blindness if untreated.
• Populations with limited access to Vitamin A-rich foods are at a higher risk of developing night blindness.

Additional Information

• Rhodopsin: A light-sensitive receptor protein found in the retina of the eye. It is essential for vision in dim light.
• Vitamin A Forms: Retinol (active form), Retinyl esters (storage form), and Beta-carotene (pro-vitamin A found in plants).
• Recommended Intake: The recommended daily allowance (RDA) of Vitamin A is approximately 900 mcg for adult men and 700 mcg for adult women.
• Global Health Concern: Vitamin A deficiency is a major public health problem in developing countries, especially affecting children and pregnant women.
• Prevention: Vitamin A supplementation programs, dietary diversification, and fortification of foods are key strategies to combat Vitamin A deficiency globally.

The correct answer is Dentist.

Key Points

• Caries refers to , which occurs due to bacterial activity on the surface of teeth.
• A dentist specializes in diagnosing, preventing, and treating diseases and conditions of the oral cavity, including dental caries.
• If left untreated, caries can lead to pain, infection, and even tooth loss.
• Regular dental checkups and maintaining oral hygiene are essential for the prevention and management of caries.
• Some treatments for caries include fillings, crowns, root canals, and fluoride therapy, depending on the severity of the decay.

Additional Information

• Dental Plaque: A sticky film of bacteria that forms on teeth and contributes to caries development.
• Fluoride: A mineral that helps strengthen tooth enamel and prevent decay; commonly found in toothpaste and drinking water.
• Enamel: The hard, outer layer of the tooth that protects against decay; caries begins when enamel is eroded.
• Periodontitis: A severe gum infection that can occur alongside untreated caries, leading to tooth and bone loss.
• Preventive Measures: Brushing twice daily with fluoride toothpaste, flossing, reducing sugar intake, and regular dental visits are key to preventing caries.

The correct answer is Australia.

Key Points

• The Kangaroo is recognized as the national symbol of Australia, representing its unique wildlife and cultural identity.
• Australia is home to an estimated 50 million kangaroos, making them an integral part of its ecosystem and economy.
• The kangaroo is featured on Australia's coat of arms along with the emu, symbolizing the nation's progress as both animals cannot move backward.
• It is also used prominently in Australian branding, such as the logo for Qantas Airways and various government and sports organizations.
• The kangaroo symbolizes strength, endurance, and adaptability, qualities often associated with Australia as a nation.

Additional Information

• Australia's Coat of Arms:
• It features the kangaroo and emu, which are native species to Australia and symbolize progress.
• The shield on the coat of arms displays six badges representing the six states of Australia.
• Kangaroo Facts:
• Kangaroos are marsupials, meaning they carry their young in a pouch.
• They are herbivorous and primarily feed on grass and leaves.
• Kangaroos are excellent jumpers and can cover up to 9 meters in one leap.
• Wildlife Protection in Australia:
• Australia has strict laws to protect its unique wildlife, including kangaroos.
• Kangaroo populations are managed to prevent overpopulation, which can affect ecosystems.
• Tourism and Economy:
• Kangaroos are a major attraction for tourists visiting Australia.
• They are also used in sustainable industries, such as kangaroo leather production.

The correct answer is Soyabean milk curd.

Key Points

• Tofu is made by coagulating soybean milk and then pressing the resulting curds into solid blocks.
• The process is similar to making cheese but uses soy milk instead of dairy milk.
• Soybean milk is derived from soybeans, which are soaked, ground, and boiled, followed by filtration to obtain the milk.
• Common coagulants used in tofu production include calcium sulfate (gypsum), magnesium chloride (nigari), or citric acid.
• Tofu is widely consumed due to its high protein content and versatility in various cuisines, especially in Asian diets.

Additional Information

• Types of Tofu: There are various types of tofu, including soft (silken tofu), firm, and extra firm, depending on the water content and texture.
• Nutritional Profile: Tofu is rich in protein, iron, calcium, and magnesium, making it a popular choice for vegetarians and vegans.
• Health Benefits: Tofu is known to be heart-healthy, as it contains isoflavones that may help in reducing cholesterol levels and improving bone health.
• Global Popularity: Though originating in China, tofu is now widely used in cuisines across Japan, Korea, Southeast Asia, and Western countries.
• Environmental Impact: Tofu production is considered eco-friendly compared to animal-based protein sources, as it requires fewer resources and generates fewer greenhouse gases.

The correct answer is Lake Baikal.

Key Points

• Lake Baikal is the deepest lake in the world, with a maximum depth of approximately 1,642 meters (5,387 feet).
• Located in southern Siberia, Russia, Lake Baikal is also the oldest freshwater lake, estimated to be around 25 million years old.
• The lake contains about 20% of the world's unfrozen freshwater, making it the largest freshwater lake by volume.
• It is home to over 1,700 species of flora and fauna, two-thirds of which are unique to the region, including the famous Baikal seal.
• Lake Baikal is a UNESCO World Heritage Site due to its rich biodiversity and geological significance.

Additional Information

• Geological Formation: Lake Baikal lies in an ancient rift valley, making it a tectonic lake formed by shifts in Earth's crust.
• Unique Biodiversity: The lake hosts the Baikal seal (Nerpa), the only freshwater seal species in the world, and various endemic fish species like the omul.
• Climate: The lake's microclimate significantly influences the surrounding region, moderating temperature extremes and supporting unique ecosystems.
• Threats: Lake Baikal faces environmental challenges such as pollution, overfishing, and climate change, which threaten its delicate ecological balance.
• Scientific Research: Due to its depth and clarity, Lake Baikal is a critical site for studying limnology (the study of inland waters) and global climate patterns.

The correct answer is Duck-billed Platypus.

Key Points

• The Duck-billed Platypus is one of the very few mammals known to lay eggs, a characteristic that sets it apart from most other mammals.
• Platypuses are monotremes, a unique subclass of mammals that includes only two species: the Platypus and Echidna.
• Female Platypuses typically lay 1-3 eggs and incubate them by curling their body around the eggs for warmth.
• The young hatch from the eggs in about 10 days and are fed by the mother’s milk, which is secreted through specialized mammary gland patches.
• Platypuses are native to Australia and are found in freshwater rivers and lakes in eastern regions of the continent.

Additional Information

• Monotremes: Monotremes are egg-laying mammals that include only the Platypus and Echidna. They are characterized by having both mammalian and reptilian traits.
• Unique Anatomy: Platypuses have a distinctive duck-like bill, webbed feet, and a tail resembling that of a beaver. The bill is highly sensitive and helps in detecting prey underwater.
• Venomous Spur: Male Platypuses possess venomous spurs on their hind legs, which can deliver a painful sting to predators or rivals during mating season.
• Conservation Status: Platypuses are classified as "Near Threatened" by the IUCN due to habitat loss and environmental changes affecting their populations.
• Milk Secretion: Unlike most mammals, Platypuses do not have nipples; their milk is secreted through specialized skin patches, and the young lap it up directly from the mother’s skin.

The correct answer is Dr. B. R. Ambedkar.

Key Points

• Dr. B. R. Ambedkar is regarded as the principal architect of the Constitution of India and served as the Chairman of the Drafting Committee.
• He played a pivotal role in formulating the laws and principles enshrined in the Indian Constitution, ensuring equality, justice, and fundamental rights for all citizens.
• Dr. Ambedkar was an eminent jurist, economist, and social reformer who championed the cause of marginalized communities in India.
• Under his leadership, the Drafting Committee finalized the Constitution, which came into effect on 26 January 1950.
• His efforts earned him the title "Father of the Indian Constitution," a testament to his significant contributions to nation-building.

Additional Information

• Drafting Committee: The Drafting Committee was formed on 29 August 1947 and comprised seven members, with Dr. B. R. Ambedkar as its Chairman.
• Indian Constitution: It is the longest written constitution in the world, containing 448 articles, 12 schedules, and numerous amendments.
• Key Features: The Constitution provides for fundamental rights, directive principles of state policy, and a parliamentary system of governance.
• Historical Significance: The framing of the Constitution marked India's transition from a colonial state to a sovereign, democratic republic.
• Dr. Ambedkar's Legacy: His contributions extend beyond the Constitution; he advocated for social justice, economic equality, and the rights of Dalits and other marginalized groups.

The correct answer is Amoebiasis.

Key Points

• Amoebiasis is a parasitic infection caused by the protozoan Entamoeba histolytica, not bacteria.
• This disease is transmitted via contaminated food and water and primarily affects the intestines.
• Symptoms include diarrhea, abdominal pain, and dysentery, making it distinct from bacterial infections.
• Unlike bacterial diseases such as Typhoid, Cholera, and Diphtheria, Amoebiasis is classified as a protozoal disease.
• Effective treatment involves anti-parasitic medications like metronidazole or tinidazole, which target protozoa rather than bacteria.

Additional Information

• Typhoid: A bacterial infection caused by Salmonella typhi, spread through contaminated food and water.
• Cholera: A bacterial disease caused by Vibrio cholerae, leading to severe diarrhea and dehydration.
• Diphtheria: Caused by Corynebacterium diphtheriae, it affects the throat and respiratory system and can be life-threatening.
• Bacteria vs Protozoa: Bacteria are single-celled prokaryotic organisms, while protozoa are single-celled eukaryotic organisms, often causing diseases like Amoebiasis and Malaria.
• Prevention of Amoebiasis: Ensure proper sanitation, drink clean water, and maintain good hygiene to avoid protozoal infections.

The correct answer is origin of Universe.

Key Points

• The Big-Bang theory describes the , stating it began as a singularity and expanded rapidly 13.8 billion years ago.
• It was first proposed by in 1927 and later supported by Edwin Hubble’s discovery of the Universe’s expansion.
• Cosmic Microwave Background (CMB) radiation, discovered in 1964, provides strong evidence for the Big-Bang theory.
• The theory explains phenomena such as (hydrogen, helium, and lithium) formed during the Big-Bang nucleosynthesis.
• It is widely accepted as the leading scientific explanation for the origin and evolution of the Universe.

Additional Information

• Singularity: A point where matter is infinitely dense, marking the beginning of the Universe according to the Big-Bang theory.
• Cosmic Microwave Background (CMB): Radiation left over from the early stages of the Universe, discovered by Arno Penzias and Robert Wilson.
• Hubble’s Law: States that galaxies are moving away from each other, providing evidence for the Universe’s expansion since the Big Bang.
• Big-Bang Nucleosynthesis: Refers to the formation of light elements like hydrogen and helium during the first few minutes after the Big Bang.
• Alternative Theories: Other explanations like the Steady State theory have been largely discarded due to lack of evidence compared to the Big-Bang theory.

The correct answer is Seismograph.

Key Points

• A seismograph is an instrument used to measure and record the intensity, duration, and characteristics of earthquakes.
• The device detects and records the motion of the ground caused by seismic waves generated during an earthquake.
• Seismographs typically use a suspended mass (or pendulum) that remains stationary while the ground moves, allowing the relative motion to be recorded.
• Modern seismographs use electronic sensors and data processing systems to precisely measure and analyze seismic activities.
• Richter scale or other magnitude scales are often used alongside seismographs to quantify the strength of earthquakes.

Additional Information

• Seismic Waves: These are vibrations caused by earthquakes, volcanic eruptions, or other underground explosions. They include P-waves (primary waves), S-waves (secondary waves), and surface waves.
• Richter Scale: A logarithmic scale developed by Charles F. Richter in 1935 to measure the magnitude of earthquakes.

Each increase in magnitude represents a tenfold increase in amplitude.

• Epicenter: The point on the Earth's surface directly above the origin of the earthquake (hypocenter). It is often the location of the most intense shaking.
• Mercalli Intensity Scale: A qualitative scale used to measure the effects of earthquakes based on observed damage and human perception. It ranges from I (imperceptible) to XII (total destruction).
• Seismology: The scientific study of earthquakes and the propagation of elastic waves through the Earth. It helps in understanding tectonic activities and mitigating earthquake risks.

The correct answer is Lose their leaves in winter.

Key Points

• Deciduous trees shed their leaves during winter or dry seasons to conserve water and energy.
• The shedding of leaves helps prevent water loss through transpiration, especially when water is scarce or frozen.
• During this period, the trees enter a state of dormancy, slowing down their metabolic activities.
• The process is triggered by changes in environmental factors such as shorter daylight hours and cooler temperatures.
• Examples of deciduous trees include oak, maple, birch, and elm.

Additional Information

• Transpiration: The process by which plants lose water vapor through small openings called stomata in their leaves.
• Dormancy: A survival mechanism in which plants temporarily stop growing and conserve resources during unfavorable conditions.
• Chlorophyll Breakdown: As leaves prepare to fall, chlorophyll breaks down, revealing other pigments like carotenoids and anthocyanins, which cause the vibrant autumn colors.
• Abscission Layer: A specialized layer of cells forms at the base of the leaf stem, facilitating leaf detachment without damaging the tree.
• Evergreen Trees: In contrast, evergreen trees like pines and spruces retain their leaves year-round and adapt differently to conserve water.

The correct answer is Gambusia.

Key Points

• Gambusia, also known as mosquito fish, is widely used for biological control of mosquito larvae.
• It feeds on mosquito larvae in stagnant water bodies, reducing the mosquito population naturally.
• These fish are commonly introduced into ponds, lakes, and other water sources prone to mosquito breeding.
• Gambusia is considered an eco-friendly and effective method to control vector-borne diseases such as malaria and dengue.
• They are hardy fish and can survive in a wide range of environmental conditions.

Additional Information

• Biological Control: It refers to the use of natural predators, parasites, or pathogens to control pest populations, minimizing the use of chemical insecticides.
• Mosquito Lifecycle: Mosquitoes undergo four stages: egg, larva, pupa, and adult. Gambusia targets the larval stage, disrupting their growth cycle.
• Vector-borne Diseases: Diseases like malaria, dengue, chikungunya, and Zika virus are transmitted by mosquitoes. Effective mosquito control is essential to curb their spread.
• Other Biological Methods: Besides Gambusia, dragonfly larvae and certain bacterial larvicides like Bacillus thuringiensis israelensis (Bti) are also used for mosquito control.
• Environmental Considerations: While Gambusia is effective, its introduction should be monitored to avoid ecological imbalance, as it may outcompete native fish species.

The correct answer is Methyl isocyanate.

Key Points

• The Bhopal gas tragedy, which occurred on the night of 2^nd-3^rd December 1984, was caused by the accidental release of Methyl isocyanate (MIC) gas from the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh.
• Methyl isocyanate (MIC) is a highly toxic and volatile chemical used in the production of pesticides, particularly carbamate insecticides.
• The leakage of approximately 40 tons of MIC gas affected over 500,000 people, causing immediate deaths, severe injuries, and long-term health complications.
• Methyl isocyanate is a colorless liquid with a strong, sharp odor, and its exposure can lead to severe respiratory, neurological, and ocular damage.
• The Bhopal gas tragedy remains one of the worst industrial disasters in history, highlighting the critical importance of industrial safety measures and regulatory oversight.

Additional Information

• Methyl isocyanate (MIC):
• Its chemical formula is CH3NCO, and it is classified as an extremely hazardous substance by regulatory agencies worldwide.
• MIC reacts violently with water and other substances, producing toxic gases like hydrogen cyanide and carbon dioxide.
• Health Effects of MIC Exposure:
• Acute exposure can cause symptoms such as coughing, chest pain, breathlessness, and pulmonary edema.
• Chronic exposure may lead to long-term effects like cancer, genetic mutations, and damage to the immune and reproductive systems.
• Union Carbide India Limited (UCIL):
• UCIL was a subsidiary of the US-based Union Carbide Corporation (UCC).
• The Bhopal gas leak occurred due to inadequate safety protocols, poor maintenance, and lack of emergency response systems.
• Key Lessons from the Tragedy:
• It underscored the need for stringent industrial safety regulations and corporate accountability.
• It led to the establishment of the Environment Protection Act of 1986 in India.
• The disaster also raised global awareness about the risks associated with hazardous chemicals.

The correct answer is Hydrogen.

Key Points

• Hydrogen is not considered a greenhouse gas because it does not trap heat in the Earth's atmosphere like other greenhouse gases.
• Greenhouse gases, such as carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O), absorb and emit infrared radiation, contributing to the greenhouse effect.
• Hydrogen, while being a critical element in energy discussions, primarily acts as a clean energy carrier rather than directly affecting atmospheric heat retention.
• The principal greenhouse gases identified by the Intergovernmental Panel on Climate Change (IPCC) include CO₂, CH₄, N₂O, and fluorinated gases.

Additional Information

• Greenhouse Effect:
• The greenhouse effect is a natural process where certain gases in Earth's atmosphere trap heat, maintaining the planet's temperature.
• Without the greenhouse effect, Earth's average temperature would be much colder, making it uninhabitable.
• Major Greenhouse Gases:
• Carbon Dioxide (CO₂): Released primarily through burning fossil fuels, deforestation, and industrial processes.
• Methane (CH₄): Emitted during agricultural activities, livestock digestion, and decomposition of organic waste in landfills.
• Nitrous Oxide (N₂O): Produced from agricultural and industrial activities, as well as combustion of fossil fuels and biomass.
• Hydrogen's Role in Energy:
• Hydrogen is a clean energy source when used in fuel cells, producing water as its only byproduct.
• It is being explored as a key component in reducing reliance on fossil fuels and achieving net-zero emissions goals.
• Fluorinated Gases:
• Fluorinated gases (e.g., hydrofluorocarbons, perfluorocarbons) are synthetic greenhouse gases used in industrial applications.
• Though present in smaller quantities, they have a much higher global warming potential (GWP) compared to CO₂.

The correct answer is Sachin Tendulkar.

Key Points

• 'Playing It My Way' is the autobiography of cricket legend Sachin Tendulkar.
• The book was released on 6 November 2014 and co-authored by Boria Majumdar, a noted cricket historian and journalist.
• It covers Sachin Tendulkar's journey in cricket, from his early days to his retirement, including his personal and professional milestones.
• The book became a bestseller, setting a record for pre-orders and sales in India.
• It provides insights into Tendulkar's life, his struggles, his cricketing philosophy, and his rise as one of the greatest batsmen in cricket history.

Additional Information

• Sachin Tendulkar:
• Known as the "God of Cricket," Sachin Tendulkar is considered one of the greatest batsmen in the history of cricket.
• He is the only player to have scored 100 international centuries.
• Tendulkar played international cricket for India from 1989 to 2013, spanning a career of 24 years.
• He was awarded the Bharat Ratna, India’s highest civilian award, in 2014.
• Boria Majumdar:
• A prominent sports historian and journalist, he has authored several books on cricket, including co-authoring Tendulkar's autobiography.
• Majumdar is known for his deep research and insights into the history and sociology of cricket.
• Autobiographies of Cricketers:
• Other notable cricket autobiographies include 'Sunny Days' by Sunil Gavaskar and 'No Spin' by Shane Warne.
• These books offer personal insights into the lives, careers, and struggles of cricketing legends.
• Cricket Milestones:
• Sachin Tendulkar was instrumental in India winning the 2011 ICC Cricket World Cup.
• He holds the record for the most runs in both Test cricket and One-Day Internationals (ODIs).

The correct answer is the Bidhan Sabha.

Key Points

• In a parliamentary system of governance, the State Council of Ministers is collectively responsible to the State Legislative Assembly, also referred to as the Bidhan Sabha.
• This principle of collective responsibility is enshrined in Article 164(2) of the Indian Constitution.
• The Bidhan Sabha, as the lower house of the state legislature, has the authority to hold the council of ministers accountable through motions like no-confidence motions.
• If the Bidhan Sabha passes a no-confidence motion against the council of ministers, they are obligated to resign collectively.
• This mechanism ensures that the executive remains accountable to the legislature, thereby upholding the democratic framework.

Additional Information

• Article 164(2): This article of the Indian Constitution states that the council of ministers shall be collectively responsible to the legislative assembly of the state.
• Collective Responsibility: It means that all ministers stand and fall together. If the legislature withdraws its support, the entire council of ministers must resign.
• Bidhan Sabha: The Bidhan Sabha is the lower house of the legislature in Indian states with a bicameral system. In states with a unicameral system, it is the sole legislative body.
• No-Confidence Motion: A motion moved in the legislative assembly to test whether the council of ministers retains the confidence of the house.
• Governor’s Role: Although the Governor appoints the Chief Minister and the council of ministers, their accountability is to the legislative assembly, not the Governor.

The correct answer is 1911.

Key Points

• Mohun Bagan defeated the East Yorkshire Regiment in the IFA Shield final on 29 July 1911, becoming the first Indian team to win the tournament.
• The victory is considered a landmark moment in India's struggle against British colonial rule, as it symbolized Indian resilience and capability.
• The match was held at the Calcutta Football Club ground, now known as the Maidan Ground.
• Mohun Bagan played barefoot, whereas the British team wore boots, showcasing the determination and skill of the Indian players.
• The final score was 2–1 in favor of Mohun Bagan, with goals scored by Shibdas Bhaduri and Abhilash Ghosh.

Additional Information

• Mohun Bagan Athletic Club: Established in 1889, it is one of the oldest football clubs in Asia and holds a significant place in Indian football history.
• IFA Shield Tournament: Instituted in 1893, it is one of the oldest football competitions in India and was dominated by British teams during its early years.
• Colonial Context: The victory in 1911 was seen as a morale booster for Indians, as it came during a period of rising nationalist sentiment against British rule.
• Legacy: The day of Mohun Bagan's IFA Shield victory, 29 July, is celebrated as "Mohun Bagan Day" to honor the historic achievement.
• Impact on Indian Football: The win popularized football in India and inspired several other Indian clubs to compete in and win major tournaments.

The correct answer is Paddy.

Key Points

• Paddy is a tropical monsoon crop, cultivated during the kharif season, which requires high temperatures (above 25°C) and abundant rainfall (100-200 cm annually).
• It is one of the most important staple food crops of India and is extensively grown in states like West Bengal, Uttar Pradesh, Punjab, and Tamil Nadu.
• Paddy cultivation is heavily dependent on the monsoon rains, and it thrives in regions with flooded fields and clayey soil for better water retention.
• India is the second-largest producer of rice globally, contributing significantly to global rice production and exports.
• The crop plays a vital role in India's agricultural economy and food security, feeding millions of people.

Additional Information

• Kharif Crops: These crops are sown during the monsoon season (June-July) and harvested in the autumn (September-October). Examples include paddy, maize, cotton, and groundnut.
• Monsoon Dependency: Tropical monsoon crops like paddy rely on the southwest monsoon for irrigation, as artificial irrigation methods are less prevalent in many rural farming areas.
• Rice Varieties: India grows different varieties of rice, including basmati and non-basmati, catering to both domestic consumption and export markets.
• Soil Requirements: Paddy is ideally grown in clayey and loamy soils with good water retention capacity, which ensures consistent water supply during its growth cycle.
• Challenges in Paddy Cultivation: Issues such as water scarcity, pest attacks, and dependency on erratic monsoon rains pose significant challenges to paddy farmers in India.

The correct answer is Birbhum.

Key Points

• Visva-Bharati is situated in the Birbhum district of West Bengal, India.
• It was founded by Rabindranath Tagore in 1921 with the aim of blending Indian and Western educational traditions.
• Visva-Bharati was declared a Central University and an Institution of National Importance in 1951 by an Act of Parliament.
• The university is located in Shantiniketan, a small town in the Birbhum district, which is renowned for its cultural and historical significance.
• The institution emphasizes the concept of "learning in the lap of nature" and serves as a hub for art, culture, and literature.

Additional Information

• Rabindranath Tagore:
• He was a Nobel laureate in literature and the founder of Visva-Bharati University.
• Tagore envisioned Shantiniketan as a place where people could engage in the free pursuit of knowledge.
• He wrote the national anthems for both India ("Jana Gana Mana") and Bangladesh ("Amar Shonar Bangla").
• Shantiniketan:
• Located in the Birbhum district, it is famous for its association with Rabindranath Tagore.
• The town hosts the annual Poush Mela, a cultural fair showcasing traditional crafts, music, and dance.
• Shantiniketan is also a UNESCO World Heritage Site.
• Visva-Bharati University's Educational Approach:
• The university combines traditional Indian education with modern Western methodologies.
• It offers courses in fine arts, humanities, social sciences, and science streams.
• The institution fosters an open-air learning environment to encourage creativity and innovation.
• Birbhum District:
• Known as the "Land of Red Soil," it is famous for its rich cultural heritage and folk traditions.
• The district is home to numerous temples, festivals, and tribal communities.
• It is an important center for Baul music, a traditional form of folk music in Bengal.

The correct answer is Ballal Sen.

Key Points

• Kulinism is a social system introduced by Ballal Sen, a king of the Sena dynasty in Bengal, during the 12^th century.
• Ballal Sen implemented Kulinism to strengthen the caste system and establish social order, particularly among Brahmins and Kayasthas.
• The system emphasized lineage purity and promoted matrimonial alliances within select families of higher social status.
• Under Kulinism, Brahmins were classified into different ranks based on their family heritage and origin.
• Ballal Sen’s objective was to consolidate power by aligning with influential families and reinforcing hierarchical structures within society.

Additional Information

• Sena Dynasty: The Sena dynasty ruled Bengal and parts of Bihar from the late 11^th to the 12^th century. It succeeded the Pala dynasty and was known for promoting Hindu culture and traditions.
• Ballal Sen: He was the second ruler of the Sena dynasty and is credited with significant reforms in religion and society, including the codification of Kulinism.
• Caste System: Kulinism was an extension of the caste system that prioritized purity of lineage, especially among the Brahmins and Kayasthas, to maintain social hierarchy.
• Criticism of Kulinism: Over time, Kulinism faced criticism for promoting inequality, rigidity, and social discrimination, which led to its decline in later centuries.
• Marriage Practices: One notable feature of Kulinism was the practice of polygamy among Kulin Brahmins, often leading to social issues and exploitation.

The correct answer is Hockey.

Key Points

• Dhyan Chand, widely regarded as one of the greatest hockey players of all time, earned the nickname "The Wizard" for his exceptional skills in the sport.
• He represented India in three Olympic Games (1928, 1932, and 1936), winning gold medals in all three editions.
• Dhyan Chand scored over 400 international goals during his career, a record that remains unparalleled in field hockey history.
• His remarkable contribution to hockey led to the celebration of his birthday (29^th August) as "National Sports Day" in India.
• In his honor, the prestigious Dhyan Chand Award is given annually for lifetime achievements in sports and games in India.

Additional Information

• Field Hockey:
• Field hockey is a team sport played on grass, turf, or synthetic surfaces, where players use sticks to hit a ball into the opponent's goal.
• It is governed internationally by the Fédération Internationale de Hockey (FIH).
• The sport has been a part of the Olympic Games since 1908.
• India's Hockey Legacy:
• India has a rich legacy in hockey, having won 8 Olympic gold medals in the sport, the most by any country.
• The Indian hockey team was dominant in the mid-20^th century, with players like Dhyan Chand leading the charge.
• National Sports Day:
• Observed on 29^th August every year in India to honor Dhyan Chand's contributions to sports.
• The day includes events to promote sports culture and the recognition of athletes across the country.
• Dhyan Chand Award:
• Instituted in 2002, this award is India's highest honor for lifetime achievements in sports.
• It recognizes athletes who have contributed significantly to the promotion and development of sports in India.

The correct answer is Solar power.

Key Points

• Solar power is a renewable energy source derived from sunlight, which is abundant and sustainable.
• Solar power generation does not produce greenhouse gas emissions, making it environmentally friendly.
• It can be harnessed using photovoltaic (PV) cells or solar thermal systems to generate electricity or heat.
• Solar energy is widely used for residential, commercial, and industrial applications globally.
• Major advancements in solar technology have made it more cost-effective and accessible in recent years.

Additional Information

• Renewable Energy: Renewable energy sources are naturally replenished and include solar, wind, hydro, geothermal, and biomass.
• Thermal Power: Thermal power is generated using fossil fuels like coal, natural gas, or oil, which are non-renewable and contribute to environmental pollution.
• Atomic Power: Atomic energy, derived from nuclear reactions, is considered clean but is not renewable due to the finite availability of uranium and thorium resources.
• Petroleum: Petroleum is a fossil fuel and non-renewable energy source, widely used for transportation and industrial purposes, but its extraction and use cause significant environmental harm.
• Global Renewable Energy Goals: Many countries aim to increase their renewable energy share in the energy mix to combat climate change and reduce reliance on fossil fuels.

The correct answer is West Bengal.

Key Points

• Gatidhara Prakalpa is a flagship scheme launched by the Government of West Bengal.
• The scheme aims to provide financial assistance to unemployed youth for self-employment opportunities.
• Under this scheme, the state government provides a subsidy of 30% of the project cost, with a maximum limit of Rs. 1 lakh.
• Beneficiaries can avail loans from banks to purchase vehicles or start small businesses, contributing to self-reliance and economic growth.
• This initiative focuses on empowering the youth and reducing unemployment in the state.

Additional Information

• Objective: The primary objective of Gatidhara Prakalpa is to enable unemployed individuals to become self-sufficient through financial support for livelihood activities.
• Eligibility: The scheme is targeted at residents of West Bengal who are unemployed and aged between 20 and 45 years.
• Focus Area: It particularly benefits individuals from economically weaker sections, including Scheduled Castes (SC), Scheduled Tribes (ST), and Other Backward Classes (OBC).
• Implementation: The West Bengal government, in collaboration with banks, ensures seamless loan processing and disbursement under this scheme.
• Impact: Gatidhara Prakalpa has significantly contributed to reducing unemployment and improving the standard of living of beneficiaries in the state.

The correct answer is Arun Jaitley.

Key Points

• On June 2014, Arun Jaitley, the then Union Finance Minister of India, was appointed as India’s Governor on the Board of Governors of the Asian Development Bank (ADB).
• The Board of Governors is the highest decision-making body in the Asian Development Bank (ADB), and its members consist of representatives from all member countries.
• India has been a founding member of the Asian Development Bank since its establishment in 1966.
• Arun Jaitley held the position of Union Finance Minister from May 2014 to August 2019, during which he represented India in various international financial institutions.
• ADB primarily focuses on promoting sustainable economic growth and reducing poverty in Asia and the Pacific region through financial assistance and policy advice.

Additional Information

• Asian Development Bank (ADB):
• ADB is a regional development bank established on 19 December 1966, headquartered in Manila, Philippines.
• It provides loans, grants, and technical assistance to its member countries to foster economic growth and development.
• ADB’s membership includes 68 countries, with 49 from the Asia-Pacific region.
• Its primary focus areas include infrastructure development, poverty alleviation, gender equality, and climate change mitigation.
• Board of Governors:
• The Board of Governors of ADB is composed of one Governor from each member country, typically represented by their Finance Minister or equivalent.
• It meets annually to discuss and decide on ADB’s policies, programs, and financial matters.
• The Governors delegate operational responsibilities to the Board of Directors, which oversees day-to-day operations.
• Arun Jaitley’s Contributions:
• During his tenure as Finance Minister, Jaitley played a pivotal role in implementing major economic reforms, including the introduction of the Goods and Services Tax (GST).
• He also advocated for India’s representation in global financial institutions and strengthened India’s international economic partnerships.
• India’s Role in ADB:
• India has been one of ADB’s largest borrowers, receiving financial support for various infrastructure and development projects.
• ADB has supported projects in India related to transport, energy, urban development, and agriculture.
• India’s active participation in ADB reflects its commitment to regional development and cooperation.

The correct answer is West to East.

Key Points

• The Earth rotates around its axis in a counterclockwise direction when viewed from above the North Pole, which corresponds to a rotation from West to East.
• This rotation is the reason why the Sun, Moon, and stars appear to rise in the East and set in the West.
• The Earth's rotation period is approximately 24 hours, which defines the length of a day.
• The rotation from West to East is responsible for the phenomenon of the Coriolis effect, which impacts weather patterns and ocean currents.

Additional Information

• Earth's Axis: The axis of rotation is an imaginary line passing through the North and South Poles, tilted at an angle of 23.5 degrees relative to its orbital plane.
• Day and Night Cycle: The rotation of Earth causes one hemisphere to face the Sun (day) while the other faces away (night).
• Coriolis Effect: This phenomenon, caused by Earth's rotation, deflects moving objects like winds and ocean currents to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
• Geostationary Satellites: These satellites orbit Earth from West to East at the same rotational speed, appearing stationary relative to a specific location on Earth's surface.
• Historical Understanding: The concept of Earth's rotation was first proposed by ancient astronomers like Aryabhata and later confirmed with modern scientific evidence.

The correct answer is Mother Teresa.

Key Points

• The iconic Park Street in Kolkata has been renamed as Mother Teresa Sarani in honor of Mother Teresa.
• This renaming was done to commemorate the contribution of Mother Teresa to humanity and her extensive work in Kolkata.
• Mother Teresa, a Nobel Peace Prize laureate (1979), was the founder of the Missionaries of Charity, an organization dedicated to serving the poor and destitute.
• The renaming reflects Kolkata's respect and recognition of her unparalleled humanitarian work in the city, particularly for the underprivileged.

Additional Information

• Mother Teresa:
• Born as Agnes Gonxha Bojaxhiu in 1910 in Skopje (modern-day North Macedonia).
• She moved to India in 1929 and spent most of her life serving the poor in Kolkata.
• She was canonized as a saint by Pope Francis on September 4, 2016.
• Her organization, the Missionaries of Charity, operates in over 130 countries.
• Missionaries of Charity:
• Founded in 1950 in Kolkata, it provides care for the sick, orphaned, and dying.
• It has received global recognition for its services to humanity.
• Park Street:
• One of Kolkata's most famous streets, known for its rich history, colonial architecture, and vibrant nightlife.
• The renaming to Mother Teresa Sarani was symbolic of the city's gratitude for her humanitarian work.
• Nobel Peace Prize 1979:
• Mother Teresa received the Nobel Peace Prize for her efforts to combat poverty and distress, which also constituted a threat to peace.
• She donated the prize money to her charity to serve the poor.

The correct answer is Prafulla Chandra Roy.

Key Points

• Prafulla Chandra Roy was the founder of Bengal Chemical & Pharmaceutical Works Ltd., established in 1901.
• He is widely regarded as the Father of Modern Indian Chemistry.
• Prafulla Chandra Roy was a pioneering Indian scientist, educator, and entrepreneur who played a significant role in promoting indigenous industries.
• Bengal Chemical was the first pharmaceutical company in India, contributing to the self-reliance of the country in the production of chemicals and medicines.
• He was also a professor at the Presidency College in Kolkata, inspiring generations of Indian scientists.

Additional Information

• Significance of Bengal Chemical:
• The establishment of Bengal Chemical marked the beginning of the indigenous pharmaceutical industry in India.
• The company manufactured a range of products including medicines, chemicals, and cosmetics.
• It promoted self-reliance and reduced dependency on imported goods during the colonial era.
• Contributions to Science:
• Prafulla Chandra Roy was known for his groundbreaking research on compounds like mercurous nitrite and its derivatives.
• His work in inorganic chemistry earned him global recognition.
• He authored the book “A History of Hindu Chemistry,” which highlighted India's ancient contributions to science.
• Legacy:
• Prafulla Chandra Roy’s contributions to science and industry made him a key figure in India’s independence movement.
• He was awarded several honors, including the Companion of the Order of the Indian Empire (CIE).
• His vision of promoting indigenous industries continues to inspire entrepreneurs and scientists in India.
• Education and Influence:
• Roy completed his education at the University of Edinburgh, earning a D.Sc. degree in Chemistry.
• He returned to India and became a professor, influencing many students to pursue careers in science.
• His efforts contributed to the spread of scientific knowledge in India during the early 20^th century.

The correct answer is Sardar Patel.

Key Points

• The Urban Housing Mission launched in October 2014 was named after Sardar Vallabhbhai Patel, one of India's most prominent freedom fighters and the first Deputy Prime Minister of India.
• The mission was renamed as Sardar Patel Urban Housing Mission in recognition of Patel’s significant contributions to nation-building and urban development.
• The program aimed to address the housing needs of the urban poor by providing affordable housing solutions and promoting planned urbanization.
• It complemented other government housing initiatives like the Pradhan Mantri Awas Yojana (PMAY) to ensure "Housing for All" by the year 2022.
• Sardar Patel is often referred to as the "Iron Man of India" for his pivotal role in unifying the country post-independence.

Additional Information

• Sardar Vallabhbhai Patel
• He played a crucial role in the integration of over 560 princely states into the Indian Union after independence in 1947.
• Patel was instrumental in framing policies for urban development and governance during his tenure as Home Minister.
• The Statue of Unity, the world’s tallest statue, was erected in his honor in Gujarat in 2018.
• Urban Housing Mission
• It was launched to provide affordable housing solutions to economically weaker sections (EWS) and low-income groups (LIG) in urban areas.
• It included provisions for slum rehabilitation, credit-linked subsidies, and public-private partnerships for housing development.
• Pradhan Mantri Awas Yojana (PMAY)
• Launched in June 2015, PMAY aimed to ensure "Housing for All" by 2022.
• It is divided into two components: PMAY (Urban) and PMAY (Rural), addressing urban and rural housing needs respectively.
• It provides interest subsidies to eligible beneficiaries for home loans under its Credit Linked Subsidy Scheme (CLSS).
• Planned Urbanization
• Planned urbanization focuses on the systematic development of cities to accommodate growing populations while ensuring sustainability.
• It includes aspects such as housing, transportation, sanitation, and green spaces to improve the quality of urban living.

The correct answer is Agriculture.

Key Points

• The primary occupation of the people of the Indus Valley Civilization was agriculture, as indicated by archaeological evidence.
• They cultivated crops such as wheat, barley, peas, sesame, and cotton, with advanced irrigation systems to support agriculture.
• Evidence of granaries in cities like Harappa and Mohenjo-daro suggests surplus food production and storage.
• They practiced plough-based farming, and terracotta models of ploughs have been discovered in sites like Banawali.
• The fertile alluvial soil along the Indus River and its tributaries made the region highly suitable for agriculture.

Additional Information

• Granaries: Massive brick structures identified as granaries have been found in Harappa and Mohenjo-daro, indicating centralized storage for agricultural surplus.
• Domesticated Animals: The Indus Valley people domesticated animals like cattle, sheep, and goats to support their agrarian lifestyle.
• Trade of Agricultural Products: Surplus agricultural produce was likely traded with neighboring regions, as evidenced by seals and trade artifacts found in Mesopotamia.
• Innovative Irrigation: They relied on seasonal river inundation and advanced irrigation techniques to maintain agricultural productivity.
• Terracotta Artifacts: Discoveries of terracotta plough models and other tools highlight the technological advancement in farming practices during that period.

Given:

Number = 6598

Formula used:

The next perfect square = Next integer of √N²

Additional number to make it a perfect square = (Next perfect square - N)

Calculations:

⇒ √6598 ≈ 81.2

⇒ Next integer = 82

⇒ Next perfect square = 82² = 6724

⇒ Additional number = 6724 - 6598

⇒ Additional number = 126

∴ The correct answer is option (3).

Given:

Time to cross a point = 27/2 sec

Speed of the train = 30 km/h

Formula used:

Length of the train = Speed × Time

Calculation:

Speed = 30 × (5/18) = 25/3 m/s

⇒ Length of Train = Speed × Time

⇒ Length = (25/3) × (27/2)

⇒ Length = 112.5 meters

∴ The correct answer is option (1).

Given:

First number = 1023

Second number = 750

Remainder for 1023 = 0

Remainder for 750 = 2

Formula Used:

To find the greatest number that divides two numbers with given remainders, we need to find the HCF (Highest Common Factor) of (first number - first remainder) and (second number - second remainder).

Calculations:

The first number to consider for HCF is 1023 - 0 = 1023.

The second number to consider for HCF is 750 - 2 = 748.

Now, we find the HCF of 1023 and 748:

Prime Factorization of 1023 and 748 are:

⇒ 1023 = 3 x 11 x 31.

⇒ 748 = 2² x 11 x 17

The last non-zero remainder is 11.

∴ The greatest number is 11.

Given:

Find the sum of all prime numbers between 2 and 12.

Formula used:

Sum = Addition of all prime numbers.

Calculation:

Prime numbers between 2 and 12 are: 3, 5, 7, 11

⇒ Sum = 3 + 5 + 7 + 11

⇒ Sum = 26

∴ The correct answer is option (1).

Given:

Rate of interest reduces from 5% to 4%

Yearly interest difference = ₹250

Formula used:

Yearly Interest = Principal × Rate × Time / 100

Calculation:

Let the capital investment (Principal) be ₹x.

Difference in interest: Interest at 5% - Interest at 4% = ₹250

⇒ x × 5 × 1 / 100 - x × 4 × 1 / 100 = 250

⇒ x × (5 - 4) / 100 = 250

⇒ x × 1 / 100 = 250

⇒ x = 250 × 100

⇒ x = ₹25,000

∴ The correct answer is option (2).

Given:

79.63 + 963.8 - x + 7.953 = 18.732

Calculations:

⇒ x = (79.63 + 963.8 + 7.953) - 18.732

⇒ x = 1051.383 - 18.732

⇒ x = 1032.651

∴ The correct answer is option (3).

Given:

Value of √(90 ÷ 0.09 × 10)

Calculation:

√(90 ÷ 0.09 × 10)

⇒ 90 ÷ 0.09 = 1000

⇒ 1000 × 10 = 10000

⇒ √10000 = 100

∴ The correct answer is option (2).

Given:

Present average age of a man and his twin sons = 30 years

Ratio of the ages of the man and one of his sons = 5 : 2

Formula Used:

Average = \(\frac{Sum\ of\ ages}{Number\ of\ people}\)

Calculations:

Let the present age of the man be 5x.

Let the present age of one son be 2x.

Since the sons are twins, the age of the other son is also 2x.

Sum of their present ages = 3 (Number of people) × 30 (Average age)

⇒ Sum of ages = 90 years

Now, sum of their ages can also be represented as:

⇒ 5x + 2x + 2x = 90

⇒ 9x = 90

⇒ x = 10

Present age of the man = 5x

⇒ Man's age = 5 × 10 = 50 years

Given:

25% of a number is 15 less than 30% of the number.

Calculation:

Let the number be N.

25% of N = 30% of N - 15

⇒ 0.25 × N = 0.30 × N - 15

⇒ 0.25 × N - 0.30 × N = -15

⇒ 0.05 × N = 15

⇒ N = 300

Now, 20% of N = 0.20 × N

⇒ 0.20 × 300 = 60

∴ The correct answer is option (2).

Given:

Number = 564823

Face value of 4 = 4

Place value of 4 = 4000

Formula used:

Product of Place Value × Face Value

Calculation:

Product = Place Value × Face Value

⇒ Product = 4000 × 4

⇒ Product = 16000

∴ The correct answer is option (1).

Given:

Red portion = \(\frac{1}{10}\)

White portion = \(\frac{1}{20}\)

Blue portion = \(\frac{1}{30}\)

Black portion = \(\frac{1}{40}\)

Violet portion = \(\frac{1}{50}\)

Yellow portion = \(\frac{1}{60}\)

Green portion length = 12.08 metre

Formula Used:

Sum of fractions of painted portions = Total painted length / Total length of pole

Remaining portion = 1 - Sum of fractions of painted portions

Calculations:

Sum of the fractions of the pole painted in different colors (excluding green):

⇒ \(\frac{1}{10} + \frac{1}{20} + \frac{1}{30} + \frac{1}{40} + \frac{1}{50} + \frac{1}{60}\)

⇒ \(\frac{60 + 30 + 20 + 15 + 12 + 10}{600}\)

⇒ \(\frac{147}{600}\) 

⇒ \(\frac{49}{200}\)

The portion painted green is the rest of the pole:

⇒ Green portion (fraction) = 1 - \(\frac{49}{200}\)

⇒ Green portion (fraction) = \(\frac{200 - 49}{200}\) = \(\frac{151}{200}\)

We are given that the length of the green portion is 12.08 metre.

Let L be the total length of the pole.

⇒ \(\frac{151}{200}\) × L = 12.08

⇒ L = \(\frac{12.08 \times 200}{151}\)

⇒ L = 16 metres

The correct answer is Option (3).

Given:

Fractions to compare: \(4\frac{2}{3}\), \(4\frac{1}{6}\), \(\frac{39}{12}\), \(\frac{47}{12}\)

Formula used:

To compare fractions, convert all fractions to improper fractions or decimal form.

Calculation:

1. Convert 4(2/3) to improper fraction:

⇒ 4(2/3) = (4 × 3 + 2)/3 = 14/3

2. Convert 4(1/6) to improper fraction:

⇒ 4(1/6) = (4 × 6 + 1)/6 = 25/6

3. Fraction 39/12 remains as it is.

4. Fraction 47/12 remains as it is.

Now, convert all fractions to decimal for comparison:

14/3 = 4.666...

25/6 = 4.166...

39/12 = 3.25

47/12 = 3.916...

Comparing decimal values: 4.666... > 4.166... > 3.916... > 3.25

∴ The largest fraction is 14/3 or \(4\frac{2}{3}\), which corresponds to Option 1.

Given:

24 persons can dig a pond in 12 days.

Formula used:

Work = Number of Persons × Number of Days

Since the work remains constant, we use:

Persons₁ × Days₁ = Persons₂ × Days₂

Calculation:

24 × 12 = Persons × 8

⇒ Persons = (24 × 12) / 8

⇒ Persons = 36

∴ The correct answer is option (4).

Given:

We need to determine the number by which 3 is multiplied to get -1.

Calculations:

Let the required number be x, then:

3 × x = -1

⇒ x = -1 / 3

∴ The correct answer is option (3).

Given:

Side of a square increased = 10%

Formula used:

Increase = New number - Original number

% increase = (Increase/Original Number) × 100

Area of square = side2

Calculations:

Let the side of the square be a 

Area of a square with side a = a²

After increasing percentage of side a by 10% = a + 10% of a

⇒ a(1 + 10/100) = a(1 + 1/10)

⇒ a(11/10) = 11a/10

Area of the square after increasing side by a = (11a/10)²

⇒ (11a/10) × (11a/10) = 121a²/100

⇒ 1.21a²

Percentage change in area of square =[(1.21a² - a²)/a²] × 100

⇒ [a²(1.21 - 1)/a²] × 100 = 0.21 × 100 

⇒ 21%

∴ Percentage change in area of square is 21%

Alternate Method

Percentage increase in a regular polygon = x + y + (xy/100)

In square length and breadth are same, x = y

Percentage increase = x + x + (xx/100)

⇒ 2x + x²/100 = 2 × 10 + 10 × 10/100

⇒ 20 + 1 = 21%

∴ The required percentage is 21%