WBCS Prelims 2017 Question Paper with Answers & Explanations

Explanation

The word mortal is derived from the Latin mortalis, which relates to death. In clinical and literary English, when applied to an illness, condition, or wound, it signifies that the affliction is of such severity that it is certain or highly likely to result in death, directly equating to the meaning of fatal.

Explanation

An orthopaedist is a medical doctor specializing in the musculoskeletal system, which includes the bones, joints, ligaments, tendons, and muscles. They diagnose, treat, and rehabilitate injuries and diseases affecting this structural framework of the body.

Explanation

The term Epicurean originates from the ancient Greek philosopher Epicurus, who taught that the greatest good is to seek modest pleasures in order to attain a state of tranquility and freedom from fear and bodily pain. In modern English usage, an Epicurean refers to a person who is devoted to refined sensuous enjoyment, particularly through the appreciation of fine food, drink, and comfort. Thus, an Epicurean is defined as one who enjoys pleasure.

Explanation

The phrasal verb call out means to shout, speak loudly, or summon someone. Combining call with the preposition out completes the sentence grammatically and semantically to indicate that he wanted to shout or summon assistance.

Explanation

The verb save is transitively followed by the preposition from when indicating rescue or protection from danger, harm, or an undesirable event. In this context, certain death is the danger, making from the grammatically correct preposition to complete the sentence.

Explanation

The relative pronoun whose is used as a possessive pronoun to show ownership or relationship. In this sentence, it indicates that the briefcase belonged to the man, making whose the grammatically correct choice to link the subordinate clause to the noun it modifies.

Explanation

The word delighted describes a state of feeling or showing great pleasure, joy, or satisfaction. In the context of a music concert, listeners who are delighted experience a highly positive, enthusiastic, and elevated emotional response. The word excited closely aligns with this meaning, as it denotes a state of great enthusiasm, eagerness, and positive emotional arousal, reflecting a favorable and lively reaction to a pleasing experience.

Explanation

The present participle rolling combines with the auxiliary verb was to form the past continuous tense, describing an ongoing action of the vehicle moving down an incline under the influence of gravity.

Explanation

The French phrase à la mode literally translates to in the fashion or according to the fashion. In English usage, it is commonly employed as an adjective to describe something that is stylish, up-to-date, or highly fashionable.

Explanation

The word cinema is commonly associated and used with theatre, as both terms pertain to the exhibition of visual arts and entertainment. A cinema theatre, often referred to as a movie theater or cinema hall, is a dedicated venue or building containing an auditorium for viewing films.

Explanation

The idiom "at sixes and sevens" is used to describe a state of confusion, disorder, or disarray. It signifies a situation where things are untidy, poorly organized, or in a state of complete chaos.

Explanation

The sentence requires a relative pronoun to refer to "the man" and a preposition to complete "asked ___". Both "whom, about" and "that, for" create grammatically correct sentences. However, "asked for" (meaning to request someone's presence) provides a more direct and natural semantic connection to "Here is the man" (presenting the requested person) than "asked about" (meaning to inquire concerning someone).

Explanation

The modal auxiliary verb "must" is used to express a strong necessity, obligation, or an urgent requirement. The phrase "at once" indicates that the action needs to be performed immediately, making "must" the most appropriate choice to convey this high level of urgency and compulsion.

Explanation

The sentence structure uses the coordinating conjunction "but" to present a direct contrast between two opposing phases of an activity. The second part of the sentence uses the infinitive "to finish" to refer to the completion of a task. To establish a logical and semantic contrast, the first blank requires an infinitive that denotes the initiation of a task. The infinitive "to begin" serves as the direct antonym to "finish" in this context, creating a balanced and meaningful parallel structure.

Explanation

The subordinating conjunction although is used to introduce a clause of concession, which expresses a contrast between two statements. In this sentence, there is a contrast between the expectation of being late and the reality of arriving home by nine. Placing although at the beginning of the sentence correctly links the subordinate clause he was late with the main clause to establish this concessive relationship.

Explanation

The verb overflow can be used transitively to mean to flow over the brim or edge of something. In the sentence, the river was overflowing the bank, the word overflowing correctly acts as a transitive verb taking the bank as its direct object, indicating that the water rose above and spilled over the riverbanks.

Explanation

The adjective shining is used to describe something that emits or reflects light brightly. Since jewels are precious stones characterized by their brilliance, luster, and ability to sparkle, describing a jewel in a locker as shining is grammatically correct and semantically appropriate.

Explanation

The idiomatic expression to make up one's mind means to make a final decision, decide on a course of action, or reach a firm resolution. The word resolved describes a state of having made a firm and definite decision to do something, making it the exact equivalent of the given phrase.

Explanation

The idiom dark horse refers to a person who keeps their talents, plans, or capabilities hidden from others, often surprising people by revealing a secret ability or achieving unexpected success. Originating from horse racing to describe an unknown horse that wins a race, the phrase is used metaphorically for any individual who possesses hidden strengths or secret abilities.

Explanation

The interjection Alas! is used in English grammar to express grief, sorrow, pity, or regret. It is an exclamation that highlights sadness or disappointment regarding an unfortunate event or circumstance. For instance, in expressions of mourning or remorse, it serves as a direct linguistic marker of unhappiness or misfortune.

Explanation

The idiom at daggers drawn is used to describe a situation where two people or groups are in a state of extreme hostility, bitter enmity, or on very bad terms with each other. It originates from the image of two opponents with their daggers drawn, ready to fight or attack one another, representing an active and unresolved conflict.

Explanation

The verb wait is followed by the preposition for when referring to expecting or anticipating the arrival of someone or something. In this sentence, the subject is anticipating the arrival of the train, making for the correct preposition to complete the phrasal combination wait for.

Explanation

Finishing a task in a competent manner means completing it skillfully and effectively, ensuring the task is done correctly. While finishing swiftly (quickly) can be desirable, competence is a more fundamental and comprehensive quality expected when a task is to be finished properly.

Explanation

The phrasal verb let up means to become less intense, to diminish, or to stop. When used in the context of weather like rain or a storm, it denotes a pause or reduction in the strength of the downpour, making it the grammatically and contextually appropriate choice for the sentence.

Explanation

The word darkness denotes the state of being dark or the complete absence of light. The direct antonym or word opposite in meaning to darkness is light, which refers to the natural agent that stimulates sight and makes things visible, illuminating the surroundings.

Explanation

Nekton refers to the aggregate of actively swimming aquatic organisms in a body of water that can move independently of water currents. These organisms are capable of powerful propulsion, allowing them to navigate through the water column at will. Examples of nektonic organisms include various species of fish, squids, marine mammals like whales and dolphins, and swimming reptiles, all of which possess specialized adaptations for active locomotion in aquatic environments.

Explanation

By definition, one nanometer (nm) is equal to 10⁻⁹ meters and one Angstrom (A) is equal to 10⁻¹⁰ meters.

Using the mathematical relation:

1 nm = 10⁻⁹ m

1A = 10⁻¹⁰ m

Dividing the value of one nanometer by one Angstrom:

(1 nm)/(1A) = 10⁻⁹ m{10⁻¹⁰ m} = 10

This simplifies to:

1 nm = 10A

Explanation

The number of Barr bodies in a somatic cell is determined by the formula N - 1, where N is the total number of X chromosomes present in the cell. Individuals with Turner syndrome have a chromosomal constitution of 45, XO, meaning they possess only a single X chromosome. Substituting N = 1 into the formula yields 1 - 1 = 0 Barr bodies. Therefore, the inactive X chromosome, known as the Barr body, is completely absent in the somatic cells of individuals with Turner syndrome.

Explanation

Echidnas belong to the order Monotremata, which comprises the only surviving group of egg-laying mammals. Along with the platypus, they are unique among mammals because they lay eggs instead of giving birth to live young, while still retaining key mammalian characteristics such as possessing hair and nursing their offspring with milk secreted from mammary glands.

Explanation

Loricifera is a phylum of microscopic, sediment-dwelling marine invertebrates first discovered and described in 1983 by Danish biologist Reinhardt Kristensen. These organisms are exceptionally tiny, typically ranging from 100 micrometers to about one millimeter in length, and are characterized by a protective corset-like outer casing known as a lorica. Because of their minute size and their tendency to adhere strongly to sediment grains, they evaded scientific detection until the late twentieth century, making this phylum the latest by discovery.

Explanation

The conversion of propyne to propene is a partial hydrogenation of an alkyne to an alkene. Lindlar's catalyst, which consists of palladium deposited on calcium carbonate and partially deactivated (poisoned) with quinoline or lead salts, restricts the hydrogenation process so that it stops at the alkene stage, preventing further reduction to the corresponding alkane.

Explanation

The preparation of a Grignard reagent (RMgBr) from an alkyl halide (RBr) and magnesium metal is a highly sensitive organometallic reaction. Magnesium reacts with the alkyl halide in the presence of dry ether, which serves as a crucial solvent because the lone pairs on the ether oxygen coordinate with and stabilize the electron-deficient magnesium center of the Grignard reagent.

Anhydrous (dry) conditions are strictly necessary because Grignard reagents are exceptionally strong bases and powerful nucleophiles. Any trace of moisture or protic species will immediately protonate the reagent, converting it to an alkane: RMgBr + H₂O → RH + Mg(OH)Br

Furthermore, the reaction must be conducted under an inert atmosphere, such as nitrogen (N₂), to prevent the highly reactive Grignard reagent from undergoing oxidation upon exposure to oxygen.

Explanation

The rate of an S_N1 reaction is determined by the stability of the carbocation intermediate formed in the rate-determining ionization step after the departure of the leaving group.

When chloromethyl methyl ether (MeO - CH₂ - Cl) loses a chloride ion, it forms the methoxymethyl carbocation (MeO - C⁺H₂). This carbocation is exceptionally stable due to strong resonance stabilization via back-donation of the lone pairs of electrons on the adjacent oxygen atom:

CH₃ - O - C⁺H₂ ↔ CH₃ - O⁺ = CH₂

In the double-bonded resonance contributor, every atom has a complete octet of electrons, which provides remarkable thermodynamic stability to the intermediate. Because of this extremely stable oxocarbenium-like transition state, the activation energy for the ionization is drastically reduced, making the rate of this solvolysis incredibly fast.

Explanation

Potato is an example of a modified underground stem known as a tuber. It stores nutrients and starch for the plant. Its stem nature is evidenced by the presence of nodes, commonly referred to as eyes, which contain auxiliary buds capable of developing into new vegetative shoots under favorable conditions.

Explanation

Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes. This highly regulated event takes place during the pachytene stage of prophase I in meiosis I. During this stage, recombination nodules appear along the synaptonemal complex at the sites where crossing over is to occur, facilitating the physical exchange of genetic segments mediated by the enzyme recombinase.

Explanation

Gregor Johann Mendel proposed the particulate theory of inheritance based on his systematic hybridization experiments with garden pea plants (Pisum sativum). This theory states that characters are inherited through discrete, individual units called factors (now known as genes) that are passed from parents to offspring. Unlike the prevailing blending inheritance model of his time, Mendel showed that these factors remain distinct and unchanged across generations, maintaining their individual integrity even when they are recessive and masked by dominant traits.

Explanation

A bacteriophage is a type of virus that infects and replicates within bacterial cells. The term literally means bacteria eater, derived from bacteria and the Greek phagein, which means to devour. These viruses consist of a protein capsid shell that encapsulates their genetic material, which can be either DNA or RNA. They function by attaching to specific receptor molecules on the surface of a target bacterium, injecting their viral genome into the host cell, and hijacking the host's cellular machinery to replicate, which typically leads to the lysis and destruction of the bacterial host.

Explanation

Protostele is the simplest and phylogenetically most primitive type of stele. It is characterized by a solid central core of xylem tissue completely surrounded by a cylinder of phloem, with no central pith present. This ancestral stelar structure is found in the earliest known fossil vascular plants, such as Rhynia, as well as in primitive extant pteridophytes like Psilotum and certain species of Lycopodium. All other complex stelar types evolved from this basic protostelic organization during the evolutionary history of vascular plants.

Explanation

In cellular respiration, the electron transport chain represents the stage where molecular oxygen is directly utilized. Oxygen acts as the final electron acceptor at the end of this transport chain. It combines with electrons and hydrogen ions to form water. This continuous removal of electrons by oxygen maintains the flow of electrons through the chain, which is essential for establishing the proton gradient used to synthesize adenosine triphosphate.

Explanation

Penicillin, the first naturally occurring antibiotic, is obtained from the genus Penicillium, which belongs to the kingdom of Fungi. Discovered by Alexander Fleming in 1928, penicillin is produced by species such as Penicillium chrysogenum and Penicillium notatum. This fungus naturally produces the antibiotic substance to inhibit the growth of surrounding Gram-positive bacteria, a property that was harnessed to create life-saving medicine.

Explanation

Electropositivity refers to the tendency of an atom to lose electrons and form positive ions. This property is inversely proportional to ionization energy. Within the periodic table, electropositivity increases down a group as the atomic radius increases and the nuclear attraction on the outermost electron weakens. Caesium possesses the lowest ionization potential among the stable elements, which allows it to lose its valence electron most readily, making it the strongest electropositive element.

Explanation

Using the Valence Shell Electron Pair Repulsion (VSEPR) theory, the steric number (SN) of the central sulfur atom in SF₄ is determined by the formula:

SN = ½ (V + M - C + A)

where V is the number of valence electrons on the central sulfur atom (6), M is the number of monovalent fluorine atoms (4), C is the cationic charge (0), and A is the anionic charge (0).

Substituting these values yields:

SN = ½ (6 + 4) = 5

A steric number of 5 indicates sp³d hybridization, which corresponds to a trigonal bipyramidal basic geometry. With 4 bonding pairs and 1 lone pair, the lone pair preferentially occupies an equatorial position to minimize lone pair-bond pair repulsions. This electronic arrangement results in a see-saw molecular geometry.

Explanation

According to the second law of thermodynamics, the spontaneity of a chemical reaction at constant temperature and pressure is determined by the change in Gibbs free energy, which is given by the relation:

Δ G = Δ H - TΔ S

where Δ H is the change in enthalpy, T is the absolute temperature in Kelvin, and Δ S is the change in entropy. For any process to occur spontaneously, the total entropy of the universe must increase, which thermodynamically translates to a net decrease in the Gibbs free energy of the system. Therefore, a chemical reaction is thermodynamically spontaneous when the change in Gibbs free energy is negative (Δ G < 0).

Explanation

RADAR is an acronym that stands for Radio Detection and Ranging. It is an electromagnetic system used to detect, locate, and track objects such as aircraft, ships, spacecraft, and motor vehicles by transmitting radio waves and measuring the signals reflected back from the targets. Originally coined by the United States Navy in 1940, the technology analyzes the time delay and frequency shift of the returned echo to calculate the distance, speed, and direction of the target.

Explanation

The net force acting on the body is the vector sum of the two forces, Fₙₑₜ = F₁ + F₂. Since the forces are unequal in magnitude and act in opposite directions, their vector sum is non-zero, Fₙₑₜ ≠ 0, which produces a translational acceleration and results in translational motion of the body. Furthermore, because the forces do not act along the same line of action, they exert a net non-zero torque, τₙₑₜ ≠ 0, about the center of mass of the body. This net torque produces an angular acceleration, causing the body to undergo rotational motion. Thus, the combined effect of these forces results in both rotational and translational motion.

Explanation

When a shaving brush is taken out of water, a thin film of water remains between the individual hairs. Due to surface tension, the liquid surface always tends to contract and minimize its surface area to achieve a state of minimum potential energy. This contracting force pulls the adjacent hairs of the brush towards each other, causing them to cling together.

Explanation

According to Rayleigh's scattering law, the intensity of scattered light I is inversely proportional to the fourth power of its wavelength:

I ∝ (1)/(λ⁴)

Red light has the longest wavelength in the visible spectrum of light. Because of this longer wavelength, it is scattered the least by air molecules, dust particles, and water droplets in the atmosphere. Consequently, red light can travel longer distances through fog, smoke, and dust with minimal attenuation, making it highly visible from far away and ideal for danger signals.

Explanation

According to the law of floatation, when a body floats in a liquid, the weight of the liquid displaced by the immersed portion of the body is equal to the total weight of the body. This relationship is expressed by the formula:

Vᵢₘₘₑᵣₛₑ_d · ρ_wₐₜₑᵣ · g = Vₜₒₜₐₗ · ρᵢ_cₑ · g

Rearranging this formula gives the fraction of the ice volume that is immersed in water:

Vᵢₘₘₑᵣₛₑ_d{Vₜₒₜₐₗ} = ρᵢ_cₑ{ρ_wₐₜₑᵣ}

The density of pure ice (ρᵢ_cₑ) is approximately 0.917 g/cm³ and the density of pure water (ρ_wₐₜₑᵣ) is 1.000 g/cm³. Substituting these density values into the ratio yields:

Vᵢₘₘₑᵣₛₑ_d{Vₜₒₜₐₗ} = (0.917)/(1.000) = 0.917

Calculating the value of the fraction ¹¹⁄₁₂ yields approximately 0.9167, which corresponds directly to this ratio.

Explanation

Household electrical appliances are connected in parallel to ensure that each appliance operates at its rated voltage, which remains constant across all parallel branches (typically 220 V in India). In a parallel configuration, each appliance is connected across the live and neutral wires, allowing it to draw current according to its power rating. This setup enables each appliance to be controlled independently using its own switch without affecting others. Additionally, if one appliance fails or is switched off, the circuit for the other appliances remains unbroken, allowing them to continue functioning normally.

Explanation

Lead is widely used as a shielding material to protect against nuclear radiation because of its high density and high atomic number. These properties allow lead to highly attenuate gamma rays and X-rays through interactions such as the photoelectric effect and Compton scattering. Because of its capability to effectively absorb ionizing radiation within a compact thickness, lead is the standard material employed in radiation shields, nuclear reactor linings, and protective garments in medical and industrial settings.

Explanation

The United Nations Security Council unanimously adopted Resolution 2328 on December 19, 2016. This resolution requested the United Nations and other relevant organizations to carry out adequate, neutral monitoring and direct observation of the evacuation of civilians and fighters from the eastern districts of Aleppo, Syria. The resolution aimed to ensure safe, immediate, and unhindered humanitarian access and to guarantee the protection and safety of all civilians during the evacuation process.

Explanation

In December 2016, China launched a new multi-modal rail and road cargo service linking Guangdong, Tibet, and Nepal. This trade route was initiated to boost cross-border trade and enhance connectivity under the Belt and Road Initiative. The transit involves transporting goods by rail from Guangzhou to Xigaze in Tibet, and then transferring them to trucks to cross the Gyirong border port into Kathmandu, Nepal, significantly reducing transit time compared to traditional sea routes.

Explanation

George Yeo is a prominent former Singaporean politician who represented the Aljunied Group Representation Constituency in the Parliament of Singapore from 1988 to 2011. During his political career in Singapore, he held several ministerial portfolios, including Minister for Information and the Arts, Minister for Health, Minister for Trade and Industry, and Minister for Foreign Affairs. He was appointed as the Chancellor of Nalanda University in July 2015 and resigned from the post in November 2016.

Explanation

Marcelo Rebelo de Sousa, a center-right politician, academic, and prominent television political commentator, won the presidential election of Portugal in January 2016. He secured over 52 percent of the vote in the first round of voting and took office as the President of Portugal on March 9, 2016, succeeding Aníbal Cavaco Silva.

Explanation

Matteo Renzi served as the Prime Minister of Italy from February 2014 to December 2016. He proposed a major constitutional reform aimed at restructuring the Italian Parliament, specifically reducing the size and powers of the Senate to streamline the legislative process. After the reforms were decisively rejected by Italian voters in a nationwide referendum held on 4 December 2016, he announced his resignation, stepping down shortly thereafter.

Explanation

General Qamar Javed Bajwa was appointed as the Chief of Army Staff of the Pakistan Army in November 2016. He was selected for this position by the then Prime Minister Nawaz Sharif and officially took charge of the post on November 29, 2016.

Explanation

The veteran Bollywood actress Rekha was honoured with the Lifetime Achievement Award at the 13th edition of the Dubai International Film Festival (DIFF) held in December 2016. She was recognized for her versatile and outstanding contributions to Indian cinema over a career spanning forty years and more than 180 films.

Explanation

The 2016 Nobel Memorial Prize in Economic Sciences was jointly awarded to Oliver Hart and Bengt Holmström for their outstanding contributions to contract theory. Their research analyzed how contracts help individuals, companies, and public institutions manage conflicting interests, providing valuable theoretical tools for understanding real-world contracts and institutions, as well as potential pitfalls in contract design.

Explanation

Canada is a member of the United Nations but is not one of the five permanent members of the Security Council. Consequently, it does not possess the veto power defined under Article 27 of the United Nations Charter, which allows only the permanent members to block any substantive resolution.

Explanation

On November 30, 2016, a two-judge bench of the Supreme Court of India, comprising Justices Dipak Misra and Amitava Roy, issued an interim order in the case of Shyam Narayan Chouksey v. Union of India. The Court directed all cinema halls across India to play the National Anthem before the screening of a movie, mandating that the national flag be displayed on the screen and that everyone present in the hall must stand to show respect. This directive was issued with the aim of instilling a sense of committed patriotism and nationalism among the citizens.

Explanation

The coastal South African city of Durban was selected as the host city for the 2022 Commonwealth Games on September 2, 2015, during the Commonwealth Games Federation General Assembly in Auckland. It became the first African city to be awarded the hosting rights for the multi-sport event, prior to being stripped of the hosting duties in March 2017 due to financial constraints.

Explanation

Vikas Krishan Yadav is a prominent Indian boxer who has represented the country in multiple international tournaments, including the Olympic Games. He won a gold medal in the Lightweight category at the 2010 Asian Games and a bronze medal in the Middleweight category at the 2011 World Amateur Boxing Championships. He also competed in the 2012 London Olympics and reached the quarterfinals in the 2016 Rio Olympics, establishing himself as one of India's leading boxing talents.

Explanation

The International Day for the Preservation of the Ozone Layer, commonly known as World Ozone Day, is observed annually on September 16. This date commemorates the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The United Nations General Assembly proclaimed this day in 1994 to raise global awareness about the depletion of the ozone layer and to promote international efforts to protect it.

Explanation

The eleventh G20 Summit was held on September 4 and 5, 2016, in Hangzhou, Zhejiang, China. This was the first G20 summit to be hosted in China, and it focused on the theme of building an innovative, invigorated, interconnected, and inclusive world economy.

Explanation

Aqeela Asifi, an Afghan refugee teacher, won the 2015 UNHCR Nansen Refugee Award. She was honored for her exceptional dedication to providing education to Afghan refugee girls living in the Kot Chandana refugee camp in Mianwali, Pakistan. Despite facing severe resource constraints and deeply entrenched cultural resistance to female education, she established multiple schools and successfully enabled over a thousand refugee girls to access primary and secondary education.

Explanation

A 7,000-year-old Neolithic settlement, described as a lost city, was unearthed in November 2016 near Motza, just outside Jerusalem, Israel, during road construction. The discovery in Egypt around the same time was a city dating back approximately 3,500 years, not 7,000.

Explanation

Brie Larson won the Academy Award for Best Actress at the 88th Academy Awards, held in 2016, for her performance as Joy Ma Newsome in the drama film Room. Her portrayal of a young mother held captive for years with her young son earned her widespread critical acclaim and several major accolades during that award season, including the Golden Globe, BAFTA, and Screen Actors Guild Awards.

Explanation

Arnab Goswami resigned from his position as the President and Editor-in-Chief of Times Now and ET Now on November 1, 2016, concluding a decade-long tenure during which he built the channel into one of India's most-watched English news broadcasters. He was particularly famous for hosting the channel's flagship prime-time debate show, The Newshour. Following his resignation, he went on to establish his own independent media venture, Republic TV, which was launched in May 2017.

Explanation

Shashi Tharoor wrote the book An Era of Darkness: The British Empire in India, which was published in 2016. The work arises from a viral speech he delivered at the Oxford Union in 2015 arguing that Britain owes reparations to its former colonies. In the book, he meticulously details how the British colonizers systematically dismantled the Indian economy, destroyed its traditional industries, and exploited its vast resources to enrich Great Britain, effectively debunking the myth of benevolent imperial rule.

Explanation

The Mullaperiyar Dam is a gravity dam constructed on the Periyar River in Kerala. It is operated and maintained by the government of Tamil Nadu under a 999-year lease agreement signed in 1886 during the British colonial era. The dispute between Kerala and Tamil Nadu centers on the safety of the aging dam, with Kerala voicing structural concerns due to its location in a seismically active zone, while Tamil Nadu relies on the dam's water to irrigate its arid southern districts and insists on maintaining or raising the water level.

Explanation

Air Chief Marshal Birender Singh Dhanoa assumed charge as the 25th Chief of the Air Staff of the Indian Air Force on 31 December 2016, following the retirement of Air Chief Marshal Arup Raha. Commissioned into the Fighter Stream of the Indian Air Force in June 1978, he had a distinguished career spanning nearly four decades, which included commanding a fighter squadron during the Kargil Conflict in 1999 and serving as the Vice Chief of the Air Staff prior to his elevation as the Air Force Chief.

Explanation

The 103rd Session of the Indian Science Congress was held from January 3 to January 7, 2016, at the University of Mysore in Mysuru, Karnataka. The focal theme of this edition was Science and Technology for Indigenous Development in India. It was inaugurated by Prime Minister Narendra Modi and coincided with the centenary celebrations of the University of Mysore.

Explanation

The third World Internet Conference was held from November 16 to November 18, 2016, in Wuzhen, Zhejiang Province, China. The annual event was organized by the Cyberspace Administration of China and the Zhejiang Provincial People's Government. The theme of the 2016 summit was Innovation-driven Internet Development for the Benefit of All – Building a Community of Common Future in Cyberspace. It brought together global internet leaders, government officials, and tech experts to discuss cyberspace governance, the digital economy, and technological innovation.

Explanation

In April 2016, five-time world chess champion Viswanathan Anand was honored with the prestigious Hridaynath Mangeshkar Award in Mumbai. Instituted in 2011 by the Mumbai-based socio-cultural organization Hridayesh Arts in honor of the renowned music composer and singer Hridaynath Mangeshkar, the award recognizes individuals who have achieved outstanding eminence in their respective fields. Anand was the first sportsperson to receive this award, which was presented to him by the Governor of Maharashtra, C. Vidyasagar Rao.

Explanation

The World Bank was established during the Bretton Woods Conference in 1944. According to its Articles of Agreement, the headquarters of the institution must be located in the territory of the member country holding the largest financial share, which is the United States. Accordingly, the World Bank is headquartered in Washington, D.C., where it operates alongside its sister institution, the International Monetary Fund.

Explanation

Banabhatta, the court poet of King Harshavardhana of Thanesar and Kannauj, was the author of the famous Sanskrit prose romance Kadambari. Written in the 7th century CE, this complexly structured romantic novel is considered one of the earliest novels in the world, though Banabhatta passed away before completing it, and the work was later finished by his son, Bhushanabhatta.

Explanation

The Mauryan Emperor Ashoka used the honorific titles Devanampriya, meaning beloved of the gods, and Piyadasi, meaning of gracious mien or one who looks on with affection, in his official rock and pillar edicts. This identification was confirmed by the Maski minor rock edict in Karnataka, where the name Ashoka is mentioned alongside the title Devanampriya.

Explanation

The Chinese Buddhist pilgrim Hiuen Tsang visited India between 630 and 643 CE during the reign of King Harshavardhana of the Vardhana dynasty. He spent several years at the university of Nalanda studying Buddhist texts and travelled extensively throughout Harsha's empire, documenting the socio-political, religious, and economic conditions of India in his travelogue, Si-Yu-Ki.

Explanation

Muhammad-bin Tughlaq transferred his capital from Delhi to Daulatabad (originally known as Devagiri) in 1327 CE. The decision was primarily strategic, as Daulatabad was centrally located in the Deccan region and allowed for better administrative and military control over southern India, while also offering protection against Mongol invasions from the northwest. The entire population, including court officials, scholars, and citizens, was ordered to migrate, though the move proved to be a failure due to administrative challenges and water shortages, leading the Sultan to order the capital's return to Delhi.

Explanation

Sir Jadunath Sarkar was a highly distinguished Indian historian who specialized in the Mughal dynasty, with a particular focus on the seventeenth and eighteenth centuries. His extensive research and meticulous use of primary Persian, Marathi, and Rajasthani sources culminated in monumental works such as the five-volume History of Aurangzib, the four-volume The Fall of the Mughal Empire, Mughal Administration, and Studies in Mughal India. His scholarly contributions laid the foundation for modern systematic research into the late Mughal period and the Maratha-Mughal relations.

Explanation

Babur, the founder of the Mughal Empire, wrote his own autobiography titled Tuzuk-i-Baburi, which is also commonly known as the Baburnama. Written in Chagatai Turkic, Babur's mother tongue, this work is celebrated for its candid, detailed, and highly personal accounts of his life, thoughts, military campaigns, and his vivid observations of the geography, flora, fauna, and culture of Hindustan. It stands as a unique and invaluable historical source for understanding the transition from Central Asia to India in the early sixteenth century.

Explanation

Sulh-i-Kul, which translates to universal peace or absolute peace, was a political and religious philosophy introduced by the Mughal Emperor Akbar. Formulated with the assistance of his close advisor Abu'l-Fazl, the policy was designed to govern a multi-religious and multi-cultural empire. It advocated for complete tolerance, harmony, and equal treatment of all religious communities, ensuring that the state did not discriminate against any individual based on their faith. Under this doctrine, individuals of all religions were granted the freedom of expression and worship, provided they did not undermine the authority of the state or engage in mutual conflict. This policy of religious neutrality and inclusivity helped Akbar consolidate his rule and secure the loyalty of his diverse subjects.

Explanation

Maharana Pratap belonged to the Sisodia clan of Rajputs, who ruled the kingdom of Mewar in Rajasthan. He was the eldest son of Maharana Udai Singh II and succeeded him to the throne of Mewar in 1572. The Sisodias traced their ancestry to the Suryavanshi lineage of Rajputs. Maharana Pratap is celebrated for his valiant military resistance against the expansionist efforts of the Mughal Emperor Akbar, most notably during the historic Battle of Haldighati in 1576.

Explanation

The Ashtadiggajas, meaning the eight elephants supporting the world in eight directions, were the group of eight celebrated Telugu poets who adorned the court of King Krishnadevaraya of the Vijayanagara Empire. Krishnadevaraya reigned from 1509 to 1529, a period widely regarded as the golden age of Telugu literature. He was a great patron of art and literature, and was himself a scholar who authored the famous Telugu work Amuktamalyada. The eight legendary poets under his royal patronage, including Allasani Peddana who was honored as the Andhra Kavita Pitamaha and Tenali Ramakrishna, made monumental contributions to Telugu poetry and classical literature.

Explanation

King Bimbisara of the Haryanka dynasty, who ruled Magadha in the 6th century BCE, was known as Seniya (or Shrenika) in Jain literature. The title Seniya, which translates to the one with an army, was given to him because he was the first Indian monarch to maintain a large, regular, and permanent standing army. Under his leadership, Magadha began its territorial expansion and military dominance in ancient India.

Explanation

Kalibangan is a major site of the Indus Valley Civilization located on the southern bank of the dry bed of the Ghaggar River in the Hanumangarh district of Rajasthan. Excavated under the leadership of B. B. Lal and B. K. Thapar, the site provides crucial evidence of both pre-Harappan and Harappan cultural phases. It is globally renowned for containing the earliest recorded ploughed agricultural field in history, alongside other distinctive features such as fire altars, which indicate ritual practices, and unique wooden drainage systems.

Explanation

Jivaka, also known as Jivaka Kumarabhacca, was the most celebrated physician and surgeon of ancient India who lived in Rajgriha during the 5th century BCE, making him a contemporary of Gautama Buddha. He completed his medical studies at the ancient university of Taxila and served as the royal physician to King Bimbisara of Magadha. He was also appointed as the personal physician to Gautama Buddha and the Buddhist monastic order, or Sangha. Jivaka is extensively mentioned in early Buddhist scriptures, particularly the Vinaya Pitaka, which records his remarkable surgical feats and his dedication to treating the Buddha.

Explanation

The Harijan Sevak Sangh was founded by Mahatma Gandhi on September 30, 1932, following his fast at the Yerwada Central Jail in Pune and the subsequent signing of the Poona Pact. Initially established under the name All India Anti-Untouchability League, it was later renamed the Harijan Sevak Sangh. Mahatma Gandhi created this non-profit organization to combat the social evil of untouchability, work for the upliftment of the depressed classes, and secure equal rights and opportunities for them in Indian society. He also launched a weekly journal titled Harijan to promote this cause and advocate for the educational and social advancement of marginalized communities.

Explanation

Velu Thampi Dalawa, the Dewan of the princely state of Travancore, led an armed rebellion against the British East India Company in 1808–1809. The revolt was triggered by the high-handed interference of the British Resident, Colin Macaulay, in the internal administration of Travancore and the heavy financial tribute demanded under the Subsidiary Alliance treaty. Velu Thampi issued the historic Kundara Proclamation on January 11, 1809, which served as an open call to the local population to rise up against British dominance and defend their independence.

Explanation

The Poona Sarvajanik Sabha was established on 2 April 1870 in Pune by prominent nationalist leaders and social reformers, including Mahadev Govind Ranade, Ganesh Vasudeo Joshi, and S. H. Chiplunkar [1]. The organisation was formed to serve as a mediating body between the British government and the Indian public, representing popular grievances and fostering political consciousness [1]. It played a pioneering role in the early phase of the Indian national movement by advocating for constitutional and administrative reforms.

Explanation

The custom of Sati was formally banned through the Bengal Sati Regulation, XVII of 1829, passed by the Governor-General of India, Lord William Bentinck. This legislative reform declared the practice of Sati—the self-immolation of widows on their husband's funeral pyre—illegal and punishable by criminal courts as culpable homicide. This progressive step was largely the result of persistent social reform movements led by Raja Ram Mohan Roy, who campaigned extensively against the practice by proving that it had no scriptural sanction.

Explanation

Guru Tegh Bahadur, the ninth Sikh Guru, was publicly executed in Delhi in 1675 under the orders of the Mughal Emperor Aurangzeb. He resisted the forced conversions of Kashmiri Pandits and non-Muslims to Islam, standing up for religious freedom and the right to practice one's own faith. When he refused to convert to Islam himself, Aurangzeb ordered his beheading at Chandni Chowk in Delhi, where Gurdwara Sis Ganj Sahib stands today.

Explanation

The Satnami rebellion occurred in 1672 during the reign of the Mughal emperor Aurangzeb. The Satnamis were a religious sect consisting primarily of peasants, artisans, and lower-caste individuals concentrated around Narnaul in modern-day Haryana. The conflict was triggered by a clash between a Satnami cultivator and a Mughal foot soldier, which quickly escalated into a major armed uprising against imperial authority. Recognizing the gravity of the revolt, Aurangzeb personally directed the military campaign and dispatched a large imperial army equipped with artillery to crush the rebellion.

Explanation

The first session of the Indian National Congress was held from 28 to 31 December 1885 at Gokuldas Tejpal Sanskrit College in Bombay. The historic session was presided over by Womesh Chandra Bonnerjee and attended by 72 delegates representing various regions of India. Although the conference was originally scheduled to be held in Poona, an outbreak of cholera in that city forced the organizers, including Allan Octavian Hume, to shift the venue to Bombay.

Explanation

The Younghusband Mission to Tibet was dispatched in 1903 by Lord Curzon, who served as the Viceroy of India from 1899 to 1905. Driven by concerns over the expansion of the Russian Empire and its growing influence in Central Asia—a geopolitical rivalry known as the Great Game—Curzon sought to counter any potential Russian presence in Tibet. He authorized a military expedition led by Colonel Francis Younghusband to establish British trade relations and influence in the region. The expedition culminated in the British occupation of Lhasa and the signing of the Treaty of Lhasa in September 1904, which granted the British trade rights and prevented Tibet from making concessions to other foreign powers.

Explanation

Mughal Emperor Akbar II conferred the title of Raja on Ram Mohun Roy in 1830. Akbar II sent Ram Mohun Roy to England as his envoy to represent him before King William IV and petition the British government to increase the Emperor's pension and allowances.

Explanation

Neel Darpan, which translates to The Indigo Mirror, is a landmark Bengali play written by Dinabandhu Mitra in 1858–1859 and published in Dhaka in 1860. The play vividly illustrated the severe exploitation, coercion, and brutality faced by peasant cultivators at the hands of European indigo planters in Bengal. By portraying the grim reality of the indigo plantation system, the play successfully galvanized public consciousness and became a powerful catalyst for the Indigo Revolt of 1859.

Explanation

The Razmnama, which translates to the Book of War, is the Persian translation of the epic Mahabharata. This grand translation project was commissioned by the Mughal Emperor Akbar in 1582 as part of his broader initiative to translate significant Sanskrit texts into Persian through the royal translation bureau, the Maktab Khana. Scholars such as Naqib Khan, Mulla Abdul Qadir Bada'uni, and Sheikh Sultan of Thaneshwar worked closely with Sanskrit pundits to produce this work, which was subsequently illustrated with exquisite Mughal miniature paintings.

Explanation

The Ain-i-Akbari, meaning the Constitution of Akbar, was written by Abu'l-Fazl, the grand vizier and court historian of the Mughal Emperor Akbar. Written in Persian, this monumental work is the third volume of the Akbarnama, the official history of Akbar's reign. It serves as a comprehensive administrative document and gazetteer, detailing the Mughal administration, army, revenues, geography, and the diverse cultural and religious traditions of the empire's people.

Explanation

The Munda rebellion, widely known as the Ulgulan or the Great Tumult, was led by Birsa Munda in the Chhotanagpur region between 1899 and 1900. Birsa Munda mobilized the tribal community against the erosion of their traditional joint landholding system (Khuntkatti system) by colonial authorities, landlords, and moneylenders. He established a new faith, declared himself a messenger of God, and aimed to reform tribal society while establishing an independent Munda Raj free from British exploitation.

Explanation

The Indian National Congress was founded on 28 December 1885. The organization was established at Gokuldas Tejpal Sanskrit College in Bombay (now Mumbai) with Allan Octavian Hume playing a prominent role as one of its main organizers. The inaugural session was attended by 72 delegates from all over India, and Womesh Chandra Bonnerjee was elected as the first president of the Congress.

Explanation

Bal Gangadhar Tilak, widely revered as Lokmanya Tilak, coined the historic slogan Swaraj is my birthright and I shall have it. He advocated for absolute self-rule (Swaraj) and used this powerful declaration to mobilize public support and ignite a nationalist spirit among the masses during the Indian independence struggle against British colonial rule.

Explanation

The All-India Muslim League was founded on 30 December 1906 in Dacca during the annual meeting of the All India Muhammadan Educational Conference. It was established under the leadership of figures such as Nawab Salimullah, Aga Khan III, and Nawab Mohsin-ul-Mulk to safeguard the political rights and representation of Muslims in British India.

Explanation

The Santhal Rebellion of 1855 to 1856 was a major tribal uprising against the oppressive colonial administration and the exploitative zamindari system in the Rajmahal Hills of the Bengal Presidency. The rebellion was led by the legendary Santhal brothers, Sidhu Murmu and Kanhu Murmu, who mobilized thousands of Santhal tribals to declare an active revolt against British rule, British-supported landlords, and corrupt moneylenders. They aimed to establish an independent Santhal state, and their heroic leadership remains a significant milestone in the history of Indian tribal resistance against foreign rule.

Explanation

Lord Canning served as the Governor-General of India from 1856 to 1862. The Revolt of 1857, which began with the mutiny of sepoys in Meerut in May 1857, broke out during his administration. He was responsible for handling the crisis and restoring British authority. Following the suppression of the uprising, the Government of India Act 1858 was passed, which transferred the governance of India from the East India Company to the British Crown, making Canning the first Viceroy of India.

Explanation

Mahatma Gandhi withdrew the Non-Cooperation Movement in February 1922 following the Chauri Chaura incident. On February 4, 1922, a violent clash occurred in Chauri Chaura, a town in the Gorakhpur district of the United Provinces, when a large group of protesters participating in the movement clashed with the police. After the police opened fire, the crowd retaliated by setting fire to the local police station, resulting in the deaths of 22 policemen. Committed to the core principle of non-violence, Gandhi believed the movement was losing its peaceful character and that the masses were not yet adequately trained for Satyagraha, leading him to suspend the nationwide agitation on February 12, 1922.

Explanation

The Lucknow Pact was an agreement reached between the Indian National Congress and the All-India Muslim League at a joint session of both parties held in Lucknow in December 1916. Spearheaded by leaders such as Bal Gangadhar Tilak and Muhammad Ali Jinnah, the pact marked a significant period of Hindu-Muslim unity, where both organisations agreed to present common political demands to the British government, including self-government for India and the acceptance of separate electorates for Muslims in provincial legislatures.

Explanation

The Aligarh Movement was a reformative and educational movement founded by Sir Syed Ahmad Khan in the late nineteenth century to promote modern western education among Indian Muslims. The central hub and focal point of this movement was the Muhammadan Anglo-Oriental College, established by Sir Syed Ahmad Khan in 1875 in Aligarh. This institution aimed to reconcile Islamic teachings with modern scientific education, thereby serving as the base for the intellectual, political, and cultural revival of the community.

Explanation

The Morley-Minto Reforms, officially known as the Indian Councils Act, were enacted in 1909. Named after John Morley, the Secretary of State for India, and Lord Minto, the Viceroy of India, these reforms introduced significant legislative and electoral changes, most notably the establishment of separate electorates for Muslims.

Explanation

The Jallianwala Bagh massacre occurred on 13 April 1919 in Amritsar, Punjab. A large, peaceful crowd had gathered at the Jallianwala Bagh ground, coinciding with the festival of Baisakhi, to protest the arrest of nationalist leaders Dr. Saifuddin Kitchlew and Dr. Satyapal under the Rowlatt Act. Acting on the orders of Brigadier-General Reginald Dyer, British troops blocked the main entrance of the ground and opened fire on the unarmed assembly without any warning, leading to the loss of hundreds of innocent lives.

Explanation

Womesh Chandra Bonerji was a co-founder and the first president of the Indian National Congress. He presided over the inaugural session of the Congress, which was held at Gokuldas Tejpal Sanskrit College in Bombay from December 28 to December 31, 1885. A distinguished barrister from Calcutta, his leadership during this first gathering of 72 delegates established the foundational goals and political platform of the early nationalist movement in India.

Explanation

The period from the foundation of the Indian National Congress in 1885 to 1905 is known as the Moderate or Liberal Phase. During this era, the Congress was dominated by leaders who advocated for constitutional methods, gradual reforms, and peaceful agitation. They expressed their demands through petitions, speeches, and resolutions, aiming to educate the Indian public and influence British public opinion. Their approach was guided by liberal political thought and a belief in the British sense of justice, laying the foundation for the organized national movement before the advent of more radical or extremist methods after the partition of Bengal in 1905.

Explanation

The Partition of Bengal, which had been implemented in 1905 by Lord Curzon, was formally annulled in 1911 by King George V during his visit to India for the Delhi Durbar. This reversal was a response to the massive and sustained protests of the Swadeshi and Boycott movements, which had united nationalists across the country. Following the annulment, Bihar and Orissa were separated from Bengal to form new provinces, while Assam was reconstituted as a separate chief commissionership. Additionally, the British government decided to shift the capital of British India from Calcutta to Delhi in the same year.

Explanation

Mahatma Gandhi gave the historic "Do or Die" slogan during his speech at the Gowalia Tank Maidan in Bombay on August 8, 1942, which marked the launch of the Quit India Movement. He exhorted the people of India to make a final, decisive effort to secure independence from British rule, declaring that they must either free the country or perish in the attempt.

Explanation

Subhas Chandra Bose founded the All India Forward Bloc on May 3, 1939. This faction was formed within the Indian National Congress after Bose resigned from the party presidency at the Tripuri session due to ideological differences with Mahatma Gandhi and the Congress High Command. The faction aimed to rally the left-wing elements of the Congress to promote a more radical and uncompromising struggle against British colonial rule.

Explanation

The Cabinet Mission visited India in March 1946. Formulated by the British Prime Minister Clement Attlee, the mission was dispatched to negotiate the terms of transfer of power to Indian leadership and to draft a framework for the creation of a constitution-making body. It consisted of three British Cabinet ministers: Lord Pethick-Lawrence, Sir Stafford Cripps, and A.V. Alexander. The mission held discussions with leaders of various political parties in India, eventually proposing a plan that led to the establishment of the Constituent Assembly of India and the formation of an Interim Government.

Explanation

The Chittagong Armoury Raid was executed on 18 April 1930 under the leadership of the revolutionary leader Surya Sen, popularly known as Masterda. He organized a group of young revolutionaries under the banner of the Indian Republican Army, Chittagong Branch. The main objective of the raid was to seize weapons from the two major government armouries in Chittagong, destroy the telegraph and telephone systems, and cut off the railway lines to completely isolate the town from the rest of the Bengal Presidency, thereby establishing a provisional revolutionary government.

Explanation

The Indian Independence Act, 1947, was an Act of the Parliament of the United Kingdom that partitioned British India into the two new independent dominions of India and Pakistan. The bill was introduced in the House of Commons on July 4, 1947, and rapidly made its way through both houses of the British Parliament before receiving the Royal Assent on July 18, 1947.

Explanation

Lord Mountbatten served as the last Viceroy of India and was appointed as the first Governor-General of independent India on August 15, 1947, when the country gained its independence. He held this office until June 21, 1948, helping to oversee the initial transition of power and the integration of princely states into the Indian Union.

Explanation

Mohammad Ali Jinnah was appointed as the first Governor-General of Pakistan upon its creation and independence on 15 August 1947. He held this position until his death on 11 September 1948. As the leader of the All-India Muslim League, Jinnah spearheaded the Pakistan Movement, which led to the partition of British India and the establishment of Pakistan as an independent dominion, earning him the titles of Quaid-i-Azam and Father of the Nation.

Explanation

The Pakistan Resolution, also known as the Lahore Resolution, was adopted by the All-India Muslim League during its three-day annual session held at Minto Park in Lahore from March 22 to March 24, 1940. Presented by A. K. Fazlul Huq, the resolution called for the creation of independent sovereign states for the Muslims in the Muslim-majority regions of northwestern and eastern British India. This event marked a crucial turning point in the struggle for independence, setting the establishment of a separate homeland as the primary goal of the Muslim League.

Explanation

During the historic Lahore Session of the Indian National Congress in December 1929, presided over by Jawaharlal Nehru, the Congress passed the Purna Swaraj resolution, which declared Complete Independence as its ultimate goal. This marked a major shift in the Indian national movement, formally setting the objective of total liberation from British colonial rule. To commemorate this decision, the tricolor flag was hoisted on the banks of the Ravi River, and January 26, 1930, was celebrated as the first Independence Day.

Explanation

The Indian National Army (INA), also known as the Azad Hind Fauj, was first founded in Singapore in September 1942 by Captain Mohan Singh. He was an officer of the British Indian Army who had surrendered to the Japanese forces during the Battle of Malaya in World War II. In collaboration with the Japanese officer Major Iwaichi Fujiwara, Captain Mohan Singh decided to recruit Indian Prisoners of War (POWs) held by Japan to form an independent military force aimed at liberating India from British colonial rule. This marked the establishment of the first Indian National Army.

Explanation

During the Second World War, the British government sent the Cripps Mission to India in March 1942, headed by Sir Stafford Cripps, to secure active Indian cooperation in the war effort. The mission proposed granting India Dominion Status only after the conclusion of the war, along with the creation of a constituent assembly to frame a new constitution. Mahatma Gandhi rejected this offer because it did not grant immediate complete independence and deferred key political changes, famously describing the proposals as a post-dated cheque on a crashing bank.

Explanation

The Muslim League, under the leadership of Muhammad Ali Jinnah, gave the call for Direct Action after withdrawing its acceptance of the Cabinet Mission Plan. Jinnah declared 16th August, 1946 as Direct Action Day to press the demand for a separate Muslim homeland of Pakistan. The day was marked by nationwide strikes and demonstrations, which subsequently led to severe communal violence, beginning with the Great Calcutta Killings and spreading to other parts of India.

Explanation

In the geographical context of mountain systems like the Western Ghats, the term Ghat refers to a gap or pass through a mountain range. The Western Ghats form a continuous mountainous wall along the western coast of India, which can only be traversed through specific natural gaps or passes. Prominent examples of these passes include the Thal Ghat, Bhor Ghat, and Palghat (or Palakkad Gap), which have historically served as vital transport and trade routes connecting the western coastal plains with the interior Deccan Plateau.

Explanation

The government of Andhra Pradesh declared Amaravati as the capital of the newly bifurcated state of Andhra Pradesh in 2015. Located in the Guntur district on the banks of the Krishna River, the foundation stone for this greenfield capital city was laid in October 2015. By 2016, the state government had transitioned its primary administrative operations, including the secretariat and the legislative assembly, to the new capital region of Amaravati.

Explanation

The Polavaram Irrigation Project is a multi-purpose national project located on the Godavari River in the state of Andhra Pradesh. The project is designed to provide irrigation benefits, generate hydroelectric power, supply drinking water to municipal and industrial areas, and enable water diversion to adjacent river basins.

Explanation

West Bengal is divided into five administrative divisions: Presidency, Burdwan (Bardhaman), Jalpaiguri, Malda, and Medinipur. Each division consists of several districts and is headed by a Divisional Commissioner. Kolkata is not an administrative division itself; instead, it is a district that falls under the jurisdiction of the Presidency division.

Explanation

The Rarh region is a distinct physiographic and geographical region in West Bengal, located between the Chota Nagpur Plateau to the west and the Ganges Delta to the east. It is characterized by an undulating topography and red, lateritic soil formed from the weathering of ancient rocks. Paschim Medinipur district contains parts of this Rarh region, particularly in its northern and western portions, where the flat alluvial plains transition into the gravelly, lateritic, and undulating landscape of the Rarh.

Explanation

Kolkata has consistently achieved the highest Human Development Index (HDI) among all districts of West Bengal. According to the West Bengal Human Development Report, Kolkata ranks first due to its superior performance across key development indicators. The district benefits from highly developed urban infrastructure, which translates into excellent health indicators such as high life expectancy at birth, robust educational attainment with high literacy rates and school enrollment, and a significantly higher per capita income and standard of living.

Explanation

The Farakka Barrage was constructed across the Ganges River in Murshidabad district of West Bengal primarily to divert water from the Ganges into the Bhagirathi-Hooghly river system through a feeder canal. This diversion was designed to augment the water flow in the Hugli River during the dry season, which is essential to flush out sediment and silt accumulation at the Kolkata Port. By increasing the water supply and flow velocity, the barrage helps maintain the depth and navigability of the channel for shipping.

Explanation

The Toto are an isolated, primitive tribal community classified as a Particularly Vulnerable Tribal Group. They reside exclusively in Totopara, a small village located in the Alipurduar district of West Bengal, situated in the Sub-Himalayan region near the border with Bhutan. Their unique language belongs to the Tibeto-Burman family, and they have preserved their distinct cultural heritage and customs through centuries of geographic isolation.

Explanation

Up to 2017, natural gas was not commercially extracted or mined in the delta region of West Bengal. Although geological surveys had been conducted in the Bengal Basin, the first commercial discovery of natural gas and oil in West Bengal was only confirmed later in 2018 at the Ashoknagar field in the North 24 Parganas district, with production subsequently beginning in December 2020.

Explanation

The western plateau region of West Bengal, which comprises the district of Purulia and parts of Bankura, Birbhum, Paschim Bardhaman, and Paschim Medinipur, receives the lowest amount of rainfall in the state. While the average rainfall of West Bengal is significantly higher, this dry western zone typically receives only about 100 to 125 cm of rainfall annually. Certain areas in this region, such as Mayureshwar in Birbhum, receive under 95 cm of rain. This deficient precipitation during the monsoon season, coupled with the high run-off of rainwater over the hard, sloping plateau terrain, makes the area highly susceptible to regular soil moisture stress and occasional drought conditions.

Explanation

India has a total geographical area of about 3.28 million square kilometres, which accounts for approximately 2.4 percent of the total land area of the world. This makes India the seventh-largest country in the world by land area.

Explanation

The easternmost state of India in terms of longitude is Arunachal Pradesh. It extends up to the longitude of 97°25' E, which contains the easternmost point of India, Kibithu (located in the Anjaw district). Due to this geographical position, Arunachal Pradesh is the first state in the country to experience sunrise.

Explanation

The normal arrival date for the summer monsoon in South Bengal, including Kolkata, is typically around June 8th to 10th. The range 5-10 June accurately encompasses this period for its normal onset.

Explanation

The variability of rainfall is inversely related to the volume of mean annual rainfall. This relationship is represented by the coefficient of variation (CV), which is calculated as the ratio of the standard deviation (σ) to the mean annual rainfall (μ), expressed as a percentage:

CV = (σ)/(μ) × 100

Areas with very low average annual rainfall tend to experience the highest degree of variability. Because Rajasthan receives some of the lowest average annual rainfall in India, particularly in its western arid regions, it has the maximum annual variation of rainfall. The coefficient of variation in these dry regions often exceeds 50 to 80 percent, making the precipitation highly unpredictable from year to year.

Explanation

Alluvial soils constitute the largest soil group in India, covering approximately 43% of the country's total geographical area (about 15 lakh square kilometers). These depositional soils are transported and deposited by major river systems, particularly the Indus, Ganga, and Brahmaputra, as well as by wave action in coastal regions. They are highly fertile, rich in potash and lime, and form the agricultural backbone of the country by supporting intensive cultivation of crops like wheat, rice, sugarcane, and pulses.

Explanation

According to the Census of India 2011, approximately 65 percent of the country's total population was below the age of 35. Specifically, about 50.1 percent of the population was aged 24 years and below, while the 25 to 34 years age bracket constituted nearly 15.7 percent of the population. This combined percentage confirms that nearly two-thirds of India's population was under 35 years of age in 2011, highlighting the country's prominent youth bulge and demographic dividend.

Explanation

The Damodar Valley Corporation (DVC) is a statutory body established in July 1948 under the Damodar Valley Corporation Act, 1948. It is the first multipurpose river valley project of independent India. The corporation functions through the joint participation of the Central Government of India along with the state governments of West Bengal and Jharkhand (formerly Bihar), which provide its capital and share its benefits and responsibilities in the Damodar River basin region.

Explanation

By 2017, based on various contemporary estimates and projections of urban agglomerations (contiguous built-up areas), Delhi had surpassed Mumbai in both population and geographical area. While the 2011 Census showed Mumbai as slightly more populous for its defined Urban Agglomeration, more recent assessments of the expanding urban footprint placed Delhi ahead on both metrics.

Explanation

Visakhapatnam Port is a premier deep-water port on the east coast of India and is widely recognized as a landlocked natural harbor. The harbor is naturally protected from the fury of storms and cyclones by a high coastal hill called the Dolphin's Nose, which acts as a barrier against the open sea. This unique geographical feature provides safe anchorage and makes it one of the safest natural harbors in the country.

Explanation

Bhilai is famous for the Bhilai Steel Plant, which was established in 1955 with help from the Soviet Union. It is India's first and main producer of steel rails, as well as a major producer of wide steel plates and other structural steel products. Operated by the Steel Authority of India Limited, the plant utilizes iron ore from the Dalli-Rajhara mines and coal from the Korba and Kargali coalfields to manufacture its steel.

Explanation

Shifting cultivation, or slash-and-burn agriculture, is traditionally practiced in forested, hilly, and mountainous terrains by various tribal communities. In West Bengal, the vast majority of the agricultural land lies in the flat and fertile alluvial plains of the Gangetic delta. The state relies heavily on intensive settled agriculture, particularly wet paddy and jute cultivation, characterized by permanent field ownership and high-intensity land use. Even in the northern mountainous regions of the state, such as Darjeeling, farming is organized through permanent terrace cultivation and commercial plantations rather than shifting forest clearance cycles.

Explanation

The Green Revolution in India, launched in the late 1960s, introduced high-yielding variety seeds, modern irrigation methods, and chemical fertilizers to boost agricultural productivity. Wheat was the primary beneficiary of these technological interventions, experiencing an unprecedented surge in both yield per hectare and total production. The growth in wheat production was so rapid and dominant compared to other crops that the early phase of the Green Revolution is widely termed the Wheat Revolution. This massive increase in wheat output, particularly in states like Punjab, Haryana, and western Uttar Pradesh, played a pivotal role in making India self-sufficient in food grain production.

Explanation

Sugarcane is India's most important cash crop in terms of the total value of agricultural production. It serves as the primary raw material for the sugar industry, which is the second-largest agro-based industry in India after textiles. The crop supports over fifty million farmers and their dependents, generating substantial direct and indirect employment in rural areas. The economic value of sugarcane production is heavily bolstered by the government-mandated Fair and Remunerative Price (FRP) system, alongside the commercial utility of its diverse byproducts. These byproducts include bagasse for electricity cogeneration, molasses for distilleries and ethanol blending programs, and press mud for organic fertilizers, all of which collectively elevate its aggregate market value.

Explanation

Digboi, located in the Tinsukia district of Assam, is the place where petroleum oil was first discovered in India in 1889. The first commercial oil well in India was drilled here, and the Digboi Refinery, which was commissioned in 1901, is India's oldest operating oil refinery as well as one of the oldest active refineries in the world.

Explanation

Tamil Nadu possessed the largest installed capacity of wind power in India as of 2017. The state benefits from strong wind currents during the southwest and northeast monsoon seasons, particularly around geographical features like mountain passes and coastal zones. The Muppandal wind farm, situated in the Kanyakumari district of Tamil Nadu, is the largest onshore wind farm in India and has historically driven the state's leadership in wind energy generation.

Explanation

Based on the given conditions, the five boys can be arranged in a linear row.

The first condition states that Kajol is sitting in between Piyush and Paresh, which gives the sequence: Piyush - Kajol - Paresh.

The second condition states that Gogol is sitting in between Ronnie and Piyush, which gives the sequence: Ronnie - Gogol - Piyush.

Combining these two sequences to form a single continuous row of five boys from left to right yields: Ronnie, Gogol, Piyush, Kajol, Paresh.

In this linear arrangement, Paresh is positioned at the extreme right end of the row, which is to the right of Gogol.

Explanation

Let us arrange the five boys in a circle facing towards the center.

According to the given conditions: Salman is to the left of Bablu. Ajoy is to the left of Salman.

This gives the sequence going left (clockwise) as: Bablu to Salman to Ajoy.

Since Rahim is between Ajoy and Tom, Rahim must be to the left of Ajoy, and Tom must be to the left of Rahim. This completes the circle in the clockwise (leftward) direction: Bablu - Salman - Ajoy - Rahim - Tom - Bablu.

Since Salman is to the left of Bablu, the person to the immediate right of Bablu (in the counter-clockwise direction) is Tom.

Explanation

The binary operation is defined as a*b = ab + b - a.

First, evaluate the inner expression 25 by substituting a = 2 and b = 5 into the formula: 25 = (2 × 5) + 5 - 2 = 10 + 5 - 2 = 13

Next, substitute this result back into the given equation c(25) = 97: c*13 = 97

Apply the definition of the operation to c*13 with a = c and b = 13: c(13) + 13 - c = 97 12c + 13 = 97 12c = 84 c = 7

Explanation

According to the given definitions: The symbol ÷ represents addition, so a ÷ b = a + b. The symbol × represents division, so a × b = a / b.

Applying these rules to the components of the expression: First part: (14 ÷ 7) = 14 + 7 = 21 Second part: (14 × 7) = 14 / 7 = 2

Combining these with the addition operator: (14 ÷ 7) + (14 × 7) = 21 + 2 = 23

If the middle operator is ÷ (which represents addition): (14 ÷ 7) ÷ (14 × 7) = (14 + 7) + (14 / 7) = 21 + 2 = 23

Explanation

Beriberi is a nutritional deficiency disease caused by a lack of thiamine (vitamin B1) in the body, which can affect the cardiovascular and nervous systems. Unlike the other options, which are names of edible fruits, beriberi is a clinical medical condition.

Explanation

Each letter of the word MASON is shifted to its immediate next alphabetical letter to obtain the code NBTPO: M + 1 = N A + 1 = B S + 1 = T O + 1 = P N + 1 = O

Applying the same logic of shifting each letter by one position (+1) to the word WORLD: W + 1 = X O + 1 = P R + 1 = S L + 1 = M D + 1 = E

This gives the code XPSME.

Explanation

The coding pattern reverses the order of letters in the given word and then shifts each letter forward by one position in the alphabetical sequence.

For BOY, writing the letters in reverse gives Y-O-B. Shifting each letter forward by one (+1) results in Z-P-C, which is ZPC.

Applying the same logic to GIRL, writing the letters in reverse order gives L-R-I-G. Shifting each letter forward by one (+1) yields: L + 1 = M R + 1 = S I + 1 = J G + 1 = H

This results in the code MSJH.

Explanation

By the given definitions, the operation ⊗ represents the Greatest Common Measure (G.C.M.) of two numbers, and ⊕ represents the Least Common Multiple (L.C.M.) of two numbers.

We first evaluate the expressions inside the parentheses:

For the first term, 12 ⊗ 16 is the G.C.M. of 12 and 16: G.C.M.(12, 16) = 4

For the second term, 24 ⊗ 36 is the G.C.M. of 24 and 36: G.C.M.(24, 36) = 12

Substituting these results back into the main expression yields: (12 ⊗ 16) ⊕ (24 ⊗ 36) = 4 ⊕ 12

By definition, this is the L.C.M. of 4 and 12: L.C.M.(4, 12) = 12

Explanation

The given series follows a sequential alphabetical pattern where the n-th term is represented as Lₙ (Lₙ₊₁)², where Lₙ is the n-th letter of the English alphabet and Lₙ₊₁ is the (n+1)-th letter.

By applying this pattern to find the first few terms: For n = 1, the first letter is a and the second is b, giving a b². For n = 2, the first letter is b and the second is c, giving b c². For n = 3, the first letter is c and the second is d, giving c d². For n = 4, the first letter is d and the second is e, giving d e². For n = 5, the first letter is e and the second is f, giving e f². For n = 6, the first letter is f (the 6th letter of the alphabet) and the second is g (the 7th letter of the alphabet), which gives f g².

Explanation

The given analogy represents the relationship of an item to its class or category. Manipuri is a classical dance form originating from the state of Manipur, making its category dance. In the same manner, Urdu is a major Indo-Aryan language spoken predominantly in South Asia, placing it under the category of language.

Explanation

By representing the movement on a Cartesian coordinate plane with the starting point at the origin (0, 0):

First, the man moves 8 km East to the point (8, 0).

Next, he turns left (North) and walks 3 km to the point (8, 3).

Then, he turns left again (West) and walks 8 km, ending at the coordinate: (8 - 8, 3) = (0, 3)

The straight-line distance from the starting point (0, 0) to the final point (0, 3) is: √((0 - 0)² + (3 - 0)²) = 3 km

Explanation

The percentage error is calculated using the formula:

Percentage Error = (Actual Value - Measured Value)/(Actual Value) × 100

Substituting the given values, where the actual weight is 80 kg and the measured weight is 72 kg:

Percentage Error = (80 - 72)/(80) × 100 = ⁸⁄₈₀ × 100 = 10%

Explanation

The amount of money the man actually receives is the total prize money minus the government tax. Since the government takes 35% of the money as tax, the man receives the remaining 65% of the total amount.

Using the direct percentage formula:

Amount received = 60,000 × (1 - ³⁵⁄₁₀₀)

Amount received = 60,000 × ⁶⁵⁄₁₀₀

Amount received = 600 × 65 = 39,000

Explanation

The selling price (SP) when a commodity is sold at a loss is calculated using the formula:

Selling Price = Cost Price × (1 - (Loss Percentage)/(100))

Given that the purchase value (Cost Price) is Rs. 250 and the loss percentage is 10%, substituting these values into the formula yields:

Selling Price = 250 × (1 - ¹⁰⁄₁₀₀)

Selling Price = 250 × 0.9

Selling Price = 225

Explanation

The relationship in the first pair is that numbers form the fundamental building blocks and basic components used in mathematics. Applying the same logic to the second pair, notes are the basic building blocks and constituent elements used to write, read, and play music.

Explanation

P is the sister of Q, and Q is the wife of R. This makes P the sister of R's wife. The sister of one's spouse is defined as a sister-in-law, establishing P as the sister-in-law of R.

Explanation

To find the ratio of A to B, we set up the equation based on the given percentage relation:

40% of A = 60% of B

Converting the percentages into algebraic form gives:

⁴⁰⁄₁₀₀ × A = ⁶⁰⁄₁₀₀ × B

By simplifying and removing the common denominator, we get:

40 A = 60 B

Rearranging the terms to express the ratio A : B (or (A)/(B)) yields:

(A)/(B) = ⁶⁰⁄₄₀

Dividing both the numerator and the denominator by their greatest common divisor, which is 20, we obtain:

(A)/(B) = ³⁄₂

This directly gives the ratio A : B as 3 : 2.

Explanation

Let the initial fares of the Bus and the Train be 4x and 5x respectively.

The new Bus fare after a 10% increase is: 4x × (1 + ¹⁰⁄₁₀₀) = 4x × 1.1 = 4.4x

The new Train fare after a 20% increase is: 5x × (1 + ²⁰⁄₁₀₀) = 5x × 1.2 = 6x

The new ratio of the Bus fare to the Train fare is calculated as: (4.4x)/(6x) = ⁴⁴⁄₆₀ = ¹¹⁄₁₅

This gives the final ratio as 11:15.

Explanation

B is the brother of A. Since C is the daughter of B and D is the brother of C, it follows that D is the son of B. The son of one's brother is a nephew, making D the nephew of A.

Explanation

The given analogy represents the relation between a sport and the country where it is traditionally regarded as the national game. Hockey is widely recognized as the national sport of India, and similarly, baseball is the national sport of America.

Explanation

The ratio of the weight of the blue ball to the green ball is given as:

W_b : W_g = 5 : 4

This can be written in fractional form as:

W_g = W_b × ⅘

Given that the weight of the blue ball is 60 g, we substitute this value into the formula:

W_g = 60 × ⅘ = 12 × 4 = 48 g

Explanation

Let the population of the district two years ago be P. According to the formula for successive percentage change, the present population is given by P × (1 + r₁/100) × (1 - r₂/100) = 494000, where r₁ is the percentage increase in the first year and r₂ is the percentage decrease in the second year.

Substituting the given values into the formula: P × (1 + 4/100) × (1 - 5/100) = 494000

This simplifies to: P × (104/100) × (95/100) = 494000 P × (26/25) × (19/20) = 494000 P × (494/500) = 494000

Solving for P: P = (494000 × 500) / 494 P = 1000 × 500 P = 500000

Explanation

Simple Interest is calculated using the formula SI = (P × R × T)/(100). Let the annual rate of interest of the Post Office be r%. The annual rate of interest of the Bank is therefore (r + 0.5)%.

The interest earned from the Post Office for 1 year is (2500 × r × 1)/(100) = 25r.

The interest earned from the Bank for 1 year is (3000 × (r + 0.5) × 1)/(100) = 30r + 15.

Equating the sum of these two interests to the total interest of Rs. 235:

25r + 30r + 15 = 235

55r + 15 = 235

55r = 220

r = 4

The annual rate of interest of the Post Office is 4%.

Explanation

Let the length of the train be L and its speed be v.

When the train passes a standing person, the distance covered is equal to the length of the train. v = (L)/(5)

When the train passes completely through the 120-meter platform, the distance covered is the sum of the length of the train and the length of the platform. v = (L + 120)/(15)

Equating the two expressions for speed: (L)/(5) = (L + 120)/(15)

Multiplying both sides by 15: 3L = L + 120

2L = 120

L = 60

Therefore, the length of the train is 60 meters.

Explanation

Using the Principle of Inclusion-Exclusion, the percentage of students who fail in at least one of the two subjects is given by the formula:

P(M ∪ E) = P(M) + P(E) - P(M ∩ E)

Here, P(M) is the percentage of students who fail in Mathematics, P(E) is the percentage of students who fail in English, and P(M ∩ E) is the percentage of students who fail in both.

Substituting the given values:

P(M ∪ E) = 35% + 15% - 10% = 40%

The percentage of students who pass in both subjects is the complement of those who fail in at least one subject:

Pass % = 100% - P(M ∪ E) = 100% - 40% = 60%

Explanation

India has a total geographical area of approximately 3.28 million square kilometers, which accounts for about 2.4 percent of the total land area of the world. This vast landmass makes India the seventh-largest country in the world by area, following Russia, Canada, the United States, China, Brazil, and Australia.

Explanation

The services sector is the dominant driver of India's economic growth and contributes the largest share to the country's Gross Value Added (GVA) and Gross Domestic Product (GDP). Historically, the share of the service sector has steadily risen, surpassing the 50% threshold in the early 2000s. By the fiscal year 2016-17, the sector accounted for approximately 53.6% of the total GVA, thereby generating more than 50% of India's GDP.

Explanation

The National Committee on Environmental Planning and Coordination (NCEPC) was established by the Government of India in February 1972 under the Department of Science and Technology. Set up during the preparatory phase of the historic United Nations Conference on the Human Environment held in Stockholm in June 1972, this committee served as the apex advisory body to formulate, review, and coordinate environmental policies, integrating ecological concerns with national development plans.