WBCS Prelims 2011 Question Paper with Answers & Explanations

Explanation

When students are "kept in" after school, it is a disciplinary action. This means they are being punished for something they did wrong, often by being made to stay late. Confinement is an aspect of this punishment, but punishment is the overarching reason and meaning.

Explanation

The idiom "to eat humble pie" means to apologize humbly or admit an error under humiliating circumstances. It typically describes a situation where someone who was previously boasting or acting arrogant is forced to admit defeat or accept a subservient position, making a sincere or forced apology.

Explanation

The idiomatic expression beside the point refers to something that is irrelevant, off-topic, or of no importance to the current discussion. When an observation is described as beside the point, it means that it does not address the main issue being considered and is therefore not relevant to the matter at hand.

Explanation

The idiom a wild-goose chase refers to a pursuit or search that is useless, foolish, and bound to be unsuccessful. It originates from the erratic and unpredictable flight of wild geese, which makes chasing them a pointless and futile endeavor. This phrase describes any endeavor or investigation that yields no positive outcome and wastes valuable time and effort.

Explanation

The idiomatic expression to make light of means to treat a matter, problem, or warning as if it is not serious, important, or significant. When someone makes light of a friend's warning, they discount its severity and choose to treat it lightly, behaving as though the warning does not deserve serious attention.

Explanation

The word imposing means grand and impressive in appearance, especially because of great size. In this sentence, a structure that is grand and massive in size would logically dwarf the surrounding buildings, making imposing the most appropriate word to describe the structure.

Explanation

The word winsome is an adjective meaning charming, appealing, or attractive in appearance or character. It is the most appropriate word to fill in the blank because charming qualities or behavior would naturally captivate and attract others.

Explanation

The verb rummage means to search unsystematically and untidily through a mass or receptacle, such as a cupboard, drawer, or bag, in search of something. In the context of thieves searching for valuable articles, they would actively and thoroughly ransack or search through the cupboards, making rummaged through the most appropriate fit for the sentence.

Explanation

The noun yield refers to the quantity of agricultural product harvested or produced from a piece of land. In the context of the sentence, the crop production or harvest generated by the farmland was sufficient to provide sustenance and support for the small family.

Explanation

The word noxious means harmful, poisonous, or very unpleasant, especially to health. It is the most appropriate term to describe vehicle exhaust fumes because they contain toxic chemicals like carbon monoxide, nitrogen oxides, and hydrocarbons that degrade air quality and pose significant risks to human health and the environment.

Explanation

The word chaos refers to a state of complete disorder, confusion, and lack of organization. The exact opposite in meaning is order, which represents a state in which everything is in its correct, neat, or well-organized place, functioning according to established rules or methods.

Explanation

The word hubbub refers to a loud, confused noise, bustle, or general uproar, typically associated with crowded city environments. The direct opposite of a noisy, chaotic, and loud state is quiet, which describes a state of silence, calmness, peace, and absence of noise.

Explanation

The phrasal verb "put by" (or "put something by") means to save or reserve money or resources for future use. This aligns perfectly with the idiom "for a rainy day," which refers to a future time of financial need or emergency.

Explanation

The phrasal verb "make off with" means to steal something and escape or run away with it. In this sentence, the past tense form "made off" combines with the preposition "with" to describe the thief fleeing with the stolen ornaments.

Explanation

The word nonchalant describes a person who is casually calm, relaxed, and indifferent, displaying a complete lack of anxiety, interest, or enthusiasm. In this context, it perfectly explains why nothing moves or emotionally affects him.

Explanation

The verb garnish means to decorate or embellish a dish of food with a small amount of another food or herb for visual or culinary enhancement. In this sentence, herbs are used to decorate the dish, making garnished the most appropriate and meaningful word to complete the sentence.

Explanation

A dissolute person is characterized by immoral or improper conduct, often involving excessive indulgence in sensual pleasures. "Debauched" is a direct synonym, meaning corrupted by sensuality or given to excessive indulgence.

Explanation

The correct feminine form of "administrator" is "administratrix". This term is commonly used, especially in legal contexts, to refer to a woman who manages or distributes an estate.

Explanation

A "string of camels" is a widely recognized collective noun, especially referring to a line of camels travelling together, often in a caravan across a desert. The other options are not typically used for groups of camels.

Explanation

An angler is specifically a person who fishes as a sport or hobby, typically using a rod and line. While a fisherman can also catch fish for a hobby, "angler" is the more precise term when the activity is done recreationally. A fishmonger sells fish, and a hunter hunts animals on land.

Explanation

The phrase "of his own volition" means by one's own free will or choice, which perfectly completes the sentence to indicate that he came willingly and not under compulsion. The other options do not create a meaningful or grammatically correct sentence.

Explanation

The word "succulent" means tender, juicy, and tasty, making it the perfect word to describe fruit and a natural continuation of "juicy." The other options relate to brevity, adequacy, or subtlety, which are not characteristics typically paired with "juicy" for fruit.

Explanation

The word "bizarre" means extremely strange or unusual. Among the options, "grotesque" means repulsively ugly or distorted, which strongly implies something strange, unusual, and likely to cause a sensation due to its oddness. The other options (beautiful, mundane, lugubrious) do not convey the meaning of extreme strangeness.

Explanation

Explicit means stated clearly and in in detail, leaving no room for confusion or doubt. Detailed is the closest synonym among the given options, as explicit instructions are typically comprehensive and thorough.

Explanation

A pot-pourri refers to a collection of diverse items or a medley. In the context of a concert of events, it means a varied mixture or combination of different performances, making "medley" the closest synonym.

Explanation

Energy is a scalar quantity, meaning it has magnitude but no associated direction. Velocity, force, and momentum are all vector quantities, possessing both magnitude and direction.

Explanation

Copper was the first metal discovered and widely used by humans, primarily because it could be found in native form and easily shaped, marking the beginning of the Chalcolithic or Copper Age. Other metals like iron, aluminium, and zinc were discovered and utilized much later due to more complex extraction methods.

Explanation

Juan Manuel Santos was the President of Colombia from August 2010 to August 2018. Therefore, in 2011, he was the President of Colombia.

Explanation

"Before Memory Fades - An Autobiography" is a well-known memoir by Fali S. Nariman, a distinguished Indian constitutional jurist and senior advocate. He chronicled his life and legal career in this book, which was published in 2010.

Explanation

The 15th Ordinary Session of the Assembly of the African Union was held in Kampala, Uganda, from July 25-27, 2010. This was the most recent major AU summit prior to the 2011 exam year.

Explanation

The 97th Annual Session of the Indian Science Congress was indeed held in Thiruvananthapuram, Kerala from January 3-7, 2010. This event was inaugurated by the then Prime Minister Dr. Manmohan Singh.

Explanation

Fiji joined the Non-Aligned Movement as its 120th member in June 2010 during the NAM Ministerial Meeting held in Havana, Cuba. This makes Fiji the correct answer.

Explanation

Article 249 of the Indian Constitution empowers Parliament to legislate on a matter enumerated in the State List if the Rajya Sabha passes a resolution declaring it necessary or expedient in the national interest. This provision allows for central intervention on state subjects under specific circumstances concerning national importance.

Explanation

When a metal plate is heated, it expands in all dimensions. The hole in the plate expands as if it were made of the same material, causing its diameter to increase. This is because the material surrounding the hole moves outwards from the center.

Explanation

According to the ideal gas law (PV=nRT), if the volume (V) is doubled and the temperature (T) in Kelvin is also doubled, the pressure (P) must remain constant for the equation to hold true, as n and R are constants. (P * 2V) = nR * (2T) simplifies to PV = nRT, meaning P remains unchanged.

Explanation

The new Indian Rupee symbol (₹) was designed by D. Udaya Kumar, an associate professor at IIT Guwahati. His design was officially adopted by the Government of India in 2010.

Explanation

Naoto Kan served as the Prime Minister of Japan from June 2010 to September 2011. This timeframe directly corresponds to the exam year of 2011, making Japan the correct country.

Explanation

Leh, the largest town in the Ladakh region, was severely impacted by a massive cloudburst and flash floods in August 2010, which caused widespread devastation and loss of life. This event fits the description perfectly for a question from 2011.

Explanation

Lt. Gen. V. K. Singh succeeded General Deepak Kapoor as the Chief of the Army Staff of the Indian Army, formally taking charge of the office on March 31, 2010. Upon assuming this command, he was promoted to the rank of four-star General, serving as the 24th Chief of the Army Staff until his retirement on May 31, 2012.

Explanation

The Permanent Settlement, also known as the Permanent Settlement of Bengal, was introduced by Governor-General Lord Cornwallis in 1793. Under this land revenue system, the zamindars were recognized as the owners of the land and were given hereditary rights of succession. The amount of land revenue that the zamindars had to pay to the East India Company was fixed permanently, which ensured a stable and predictable source of income for the British administration while creating a loyal class of landholders in the Bengal Presidency.

Explanation

The Andasol Solar Power Station in Spain, a concentrated solar power (CSP) plant, completed its third unit in 2011, bringing its total capacity to 150 MW. This made it one of the largest solar power stations in the world at that time. Major solar power stations in the USA with comparable or larger capacity opened later than 2011.

Explanation

In June 2010, Canada hosted both the G8 and G20 summits back-to-back. The 36th G8 summit was held in Huntsville, Ontario (Muskoka region) from June 25 to 26, 2010, and the 4th G20 summit immediately followed in Toronto from June 26 to 27, 2010. This consecutive hosting by Canada made Toronto the primary metropolitan focal point associated with both global leadership summits in 2010.

Explanation

Priyanka Chopra was appointed as the UNICEF National Ambassador in August 2010, tasked with advocating for child rights and raising awareness about adolescent girls in India. In this role, she focused on empowering young girls, advocating for their right to education, health, and dignity. Prior to her official appointment, she had been actively supporting UNICEF's initiatives since 2006 by recording public-service announcements and participating in panel discussions on the rights of children.

Explanation

The main Buddhist religious texts, notably the Tripitakas which comprise the Vinaya Pitaka, Sutta Pitaka, and Abhidhamma Pitaka, were written in Pali. Gautama Buddha preached his teachings in the local dialects of the masses, and the earliest canonical literature of Theravada Buddhism was compiled and preserved in Pali, making it the primary sacred language of early Buddhism.

Explanation

The first World Classical Tamil Conference was held in Coimbatore, Tamil Nadu, from June 23 to June 27, 2010. The conference was organized by the Government of Tamil Nadu under the leadership of then Chief Minister M. Karunanidhi to celebrate the recognition of Tamil as a classical language. It brought together scholars, researchers, and Tamil enthusiasts from across the globe to present academic papers, participate in literary discussions, and celebrate Tamil heritage. The official theme song of the conference was composed by A. R. Rahman with lyrics written by M. Karunanidhi.

Explanation

Laura Chinchilla Miranda served as the first female President of Costa Rica, holding office from May 2010 to May 2014. She won the presidential election in February 2010 as the candidate of the National Liberation Party, having previously served as one of the Vice Presidents and the Minister of Justice under the administration of Oscar Arias Sanchez.

Explanation

Dadabhai Naoroji, widely known as the Grand Old Man of India, became the first Indian to be elected to the British House of Commons in 1892. He won the election from the Finsbury Central constituency representing the Liberal Party. During his tenure, he worked to draw attention to Indian grievances, particularly focusing on the economic drain of India under British rule.

Explanation

Article 243-H of the Constitution of India, introduced by the 73rd Constitutional Amendment Act of 1992, empowers the State Legislature to enact laws that authorize Panchayats to levy, collect, and appropriate specified taxes, duties, tolls, and fees. This constitutional provision is designed to strengthen the financial autonomy of rural local self-governments by enabling them to generate their own revenue sources, in addition to receiving assigned revenues and grants-in-aid from the Consolidated Fund of the State.

Explanation

The Planning Commission of India was established by an executive resolution of the Government of India in March 1950. Dr. P. V. Rajamannar, the Chairman of the Fourth Finance Commission, famously described the Planning Commission as a quasi-political body in his supplementary note to the commission's report. Unlike constitutional or statutory bodies such as the Finance Commission, which operate independently of the political executive, the Planning Commission was closely integrated with the active government. It was chaired by the Prime Minister and included several Union Cabinet Ministers as members. This heavy overlap with the executive leadership and its central role in policy formulation gave it a distinct quasi-political character.

Explanation

Acharya J. B. Kripalani served as the President of the Indian National Congress during the crucial transition of power and Indian Independence in August 1947. He was elected to the presidency at the Meerut session of the Congress in November 1946 and held the office until his resignation in November 1947.

Explanation

Bangladesh Prime Minister Sheikh Hasina was conferred the prestigious Indira Gandhi Prize for Peace, Disarmament and Development in January 2010. She was selected for her outstanding contributions to the promotion of democracy and pluralism, her determined drive to alleviate poverty, and her consistent commitment to peace.

Explanation

The All India Trade Union Congress (AITUC) is the oldest trade union federation in India. It was founded on October 31, 1920, in Bombay under the leadership of Lala Lajpat Rai, who also presided over its inaugural session as the first president. The organisation was established to give India representation at the newly formed International Labour Organisation (ILO) of the League of Nations and to coordinate the activities of various trade unions across the country. Lala Lajpat Rai played a pivotal role in linking the interests of the working class with the broader national movement for independence.

Explanation

The indigenously developed third-generation fire-and-forget anti-tank guided missile, Nag, was successfully test-fired from the Integrated Test Range at Chandipur, Orissa. Developed by the Defence Research and Development Organisation under the Integrated Guided Missile Development Programme, the missile's early developmental flights and control trials were conducted from this coastal testing site to validate its guidance, propulsion, and tracking capabilities.

Explanation

The spring constant K of a spring is inversely proportional to its length L:

K ∝ 1/L ⟹ K · L = constant

Let the original spring have length l and spring constant K. It is cut into two pieces of lengths l₁ and l₂. The total length is:

l = l₁ + l₂

Given that l₁ = nl₂, we can express l₂ as:

l₂ = l₁/n

Substituting this back into the total length equation:

l = l₁ + l₁/n = l₁((n+1)/n)

l₁ = l(n/(n+1))

Using the relation K₁ · l₁ = K · l, we find the spring constant K₁ of the piece with length l₁:

K₁ = K(l/l₁) = K(l / (l(n/(n+1)))) = K(1+n)/n

With the digit 1 typographed as l in the choices, this corresponds to:

K(l+n)/n

Explanation

The resistance of a wire is given by the formula R = ρ (L)/(A), where ρ is the resistivity, L is the length, and A is the cross-sectional area. The mass of the wire is M = A · L · d, where d is the density of the material. Since both copper wires have the same weight and density, their volumes are equal, meaning V = A_A L_A = A_B L_B.

Expressing the length as L = (V)/(A) and substituting it into the resistance formula gives:

R = ρ (V)/(A²)

Since the cross-sectional area of a wire with radius r is A = π r², the resistance can be written as:

R = ρ (V)/(π² r⁴)

For wires of the same material and volume, the resistance is inversely proportional to the fourth power of the radius:

R ∝ (1)/(r⁴)

Taking the ratio of the resistances of wire A and wire B:

(R_A)/(R_B) = ((r_B)/(r_A))⁴

Since the radius of B is half that of A, we have r_B = (r_A)/(2), which simplifies the ratio to:

(R_A)/(R_B) = (½)⁴ = ¹⁄₁₆

Explanation

The United Nations Convention on Biological Diversity (CBD) held its landmark 10th Conference of the Parties (COP 10) in Japan in October 2010. This summit was preceded and supported by several high-level preparatory workshops, regional consultations, and international planning meetings hosted in Tokyo, Japan, to formulate the post-2010 global biodiversity framework. These efforts culminated in the historic adoption of the Nagoya Protocol on Access and Benefit Sharing and the Aichi Biodiversity Targets for the 2011–2020 decade.

Explanation

China launched its first high-resolution, stereoscopic mapping satellite, Mapping Satellite-I (Tianhui-1), on August 24, 2010. The satellite was launched using a Long March 2D carrier rocket from the Jiuquan Satellite Launch Center in northwestern China. Developed by a subsidiary of the China Aerospace Science and Technology Corporation (CASC), the satellite was designed to conduct scientific experiments, carry out precise surveys of land resources, and perform stereoscopic mapping for economic and scientific development.

Explanation

Alexander the Great crossed the Indus River and invaded the Indian subcontinent in 326 BC. His campaign included the famous Battle of the Hydaspes against King Porus and concluded when his homesick, weary soldiers refused to advance beyond the Beas River. After making administrative arrangements for the conquered territories, he began his return journey in 325 BC. In total, Alexander stayed in India for a period of 19 months.

Explanation

Venkatarama Pandit Krishnamurthy, popularly known as V. K. Murthy, was an acclaimed Indian cinematographer who collaborated extensively with filmmaker Guru Dutt. In 2010, he was conferred the Dada Saheb Phalke Award for the year 2008. This achievement made him the first cinematographer to receive the country's highest award in cinema.

Explanation

Badruddin Tyabji was elected as the President of the Indian National Congress during its third annual session held in Madras in December 1887. A distinguished lawyer, social reformer, and political leader from Bombay, he became the first Muslim to hold this prestigious position. His presidency played a significant role in promoting national unity, emphasizing that the Congress represented all communities and interests across the Indian subcontinent.

Explanation

Baburnama is the autobiography of Zahir-ud-din Muhammad Babur, the founder of the Mughal Empire. Originally written in Chagatai Turkic, Babur's native language, the memoir details his personal life, military campaigns, and extensive observations about the geography, society, flora, and fauna of Central Asia, Afghanistan, and the Indian subcontinent.

Explanation

India and the United Kingdom signed a Joint Declaration on Civil Nuclear Cooperation on February 11, 2010. The declaration was signed in New Delhi by Srikumar Banerjee, the Chairman of India's Atomic Energy Commission, and Richard Stagg, the British High Commissioner to India. This agreement established a framework to promote and facilitate bilateral trade, technology transfer, and collaborative scientific research in the peaceful uses of nuclear energy.

Explanation

Sardar Vallabhbhai Patel is known as the Iron Man of India for his monumental role in the political integration of the country. As the first Home Minister and Deputy Prime Minister of independent India, he demonstrated exceptional leadership, diplomacy, and firmness in successfully merging over 560 princely states into the Indian Union, thereby securing the territorial unity and integrity of the nation.

Explanation

The Janata Party government led by Morarji Desai came to power in 1977 and terminated the Fifth Five-Year Plan a year early in 1978. In its place, they introduced the concept of a Rolling Plan, which was originally formulated to cover the five-year period from 1978 to 1983. Under this planning mechanism, the performance of the plan is assessed annually, allowing the government to revise the targets and financial allocations for the subsequent years dynamically. Although the incoming Congress government terminated this arrangement in 1980 to start a fresh Sixth Five-Year Plan for the 1980-85 period, the designated duration of the Rolling Plan remains 1978-83.

Explanation

The principle of equal pay for equal work for both men and women is enshrined under Article 39(d) of the Constitution of India, which is part of the Directive Principles of State Policy in Part IV. These principles are fundamental in the governance of the country, directing the State to secure a social order aimed at promoting the welfare of the people and reducing disparities.

Explanation

According to the 2001 Census of India, the overall sex ratio of the country was 933 females per 1000 males. This represented a marginal increase from the sex ratio of 927 females per 1000 males recorded during the 1991 Census.

Explanation

The 42nd Constitutional Amendment Act of 1976, enacted during the administration of Prime Minister Indira Gandhi, amended the Preamble of the Constitution of India to include three new terms: socialist, secular, and integrity. Prior to this amendment, the character of India as a secular and socialist state was implicit within the Directive Principles of State Policy and Fundamental Rights, but this amendment made these foundational principles explicit in the introductory statement of the Constitution.

Explanation

The Sundarbans, the world's largest contiguous mangrove ecosystem, is dominated by a complex network of saline tidal rivers, estuarine creeks, and deltaic channels. Due to the high salinity of the soil and frequent inundation by brackish water, conventional agriculture is severely constrained. As a result, the local inhabitants depend heavily on fishing and allied aquaculture activities as their primary source of livelihood. The rich estuarine and marine environment provides abundant resources of fish, crabs, and shrimps, supporting the local population through direct harvesting, processing, and trading.

Explanation

The Public Accounts Committee is responsible for examining the audit reports of the Comptroller and Auditor General on the appropriation and finance accounts of the Government of India. Its core function is to ensure that the money granted by Parliament has been spent within the scope of the demand and for the specific purpose for which it was sanctioned. This process involves evaluating financial regularity, checking whether expenditures conform to the governing rules and legal authority, and verifying that public funds are utilized lawfully and with proper authorization.

Explanation

Commercial nuclear power plants generate electricity using nuclear fission. In this process, a heavy nucleus, such as uranium-235 or plutonium-239, absorbs a neutron and becomes unstable. This instability causes the nucleus to split into lighter nuclei, releasing a large amount of thermal energy along with two or three free neutrons. These released neutrons go on to initiate further fission events in a controlled chain reaction, and the generated heat is used to produce steam that drives turbines to generate electricity.

Explanation

Newton's law of gravitation states that the gravitational force F between two masses m₁ and m₂ separated by a distance r is given by the formula: F = (G m₁ m₂)/(r²)

By rearranging the formula, the gravitational constant G is expressed as: G = (F r²)/(m₁ m₂)

In the CGS system of units, the unit of force F is the dyne, which is equivalent to gm · cm · sec⁻². The unit of distance r is the centimeter (cm), and the unit of mass m is the gram (gm). Substituting these CGS units into the equation for G: G = (gm · cm · sec⁻²) · cm²{gm²}

Simplifying the expression yields the final unit: cm³ sec⁻² gm⁻¹

Explanation

Sopara, historically known as Shurparaka and located in the modern Palghar district of Maharashtra, was one of the most prominent ancient port towns and trade hubs on the western coast of India. Under the Satavahana dynasty, it reached its zenith of commercial and economic prosperity, serving as a vital maritime gateway that connected the Deccan region with international trade routes. It facilitated active trade with distant regions such as the Roman Empire, Mesopotamia, Egypt, Arabia, and Eastern Africa. Archaeological excavations at the site have unearthed numerous Satavahana-era artifacts, including lead and silver coins of Satavahana rulers like Yajnasri Satakarni, confirming its significance as a major administrative and maritime center under their rule.

Explanation

Raja Rammohan Roy is widely acknowledged as the Morning Star of the Indian Renaissance and the Father of Modern India due to his pioneering role in ushering the country into the modern era. In the early nineteenth century, he initiated socio-religious reforms that challenged orthodox practices, promoting rationalism, monotheism, and human dignity. He founded the Brahmo Sabha in 1828, which later became the Brahmo Samaj, to fight social evils such as the Sati system, polygamy, child marriage, and caste rigidity. His persistent campaigns led to the legal abolition of Sati in 1829. He also strongly advocated for the introduction of modern Western education, scientific learning, and freedom of the press in India.

Explanation

The Mughal Emperor Akbar introduced Din-i-Ilahi (the divine faith) in 1582 AD. This syncretic religious philosophy combined elements from various religions practiced within his empire, primarily Hinduism and Islam, along with influences from Christianity, Zoroastrianism, and Jainism. Akbar designed Din-i-Ilahi to promote moral virtues such as piety, compassion, and tolerance among his subjects, aligning with his broader policy of Sulh-i-kul (universal peace) to unify a diverse empire.

Explanation

Let u and v represent the magnitudes of the object distance and the real image distance from a convex lens of focal length f. The total distance D between the object and its real image is given by: D = u + v

According to the lens formula: ¹⁄ᵥ + ¹⁄ᵤ = (1)/(f)

This gives: v = (uf)/(u - f)

Substituting the value of v into the expression for D yields: D = u + (uf)/(u - f) = (u²)/(u - f)

To find the value of u that minimizes D, we take the derivative of D with respect to u and equate it to zero: (dD)/(du) = (2u(u - f) - u²)/((u - f)²) = 0 u² - 2uf = 0

Since u ≠ 0, this simplifies to: u = 2f

Substituting u = 2f back into the lens formula gives v = 2f. Therefore, the minimum distance between the object and its real image is: Dₘᵢₙ = u + v = 2f + 2f = 4f

Explanation

Tejaswini Sawant became the first Indian woman shooter to win a gold medal at the ISSF World Championships. She achieved this historic feat on August 8, 2010, at the 50th ISSF World Shooting Championships held in Munich, Germany. Competing in the women's 50-metre Rifle Prone event, she shot a score of 597 out of 600 to secure the top spot, equaling the then world record set in 1998.

Explanation

The Munda Revolt, also known as the Ulgulan or the Great Tumult, was led by Birsa Munda in the region south of Ranchi between 1899 and 1900. The rebellion aimed to establish Munda Raj by reforming tribal society and resisting the exploitation of British authorities, missionaries, and non-tribal landlords who disrupted their traditional Khuntkatti land system.

Explanation

Lord Mayo, who served as the Viceroy of India from 1869 to 1872, was assassinated on 8 February 1872 during his official visit to the penal settlement of Port Blair in the Andaman Islands. He was stabbed to death by Sher Ali Afridi, a Pathan convict who was serving life imprisonment at Hope Town near Mount Harriet. Lord Mayo is the only Governor-General and Viceroy of India to have been assassinated in office.

Explanation

The Green Revolution was initiated in India in 1965, which falls within the timeline of the Third Five Year Plan (1961 to 1966). Under the leadership of agricultural scientist M.S. Swaminathan and the Ministry of Food and Agriculture, high-yielding variety (HYV) seeds of wheat, modern irrigation methods, and chemical fertilizers were introduced to tackle the severe food shortage and make India self-sufficient in food grain production.

Explanation

Vladimir Putin, then Prime Minister of Russia, visited India on March 11-12, 2010, for a bilateral summit. This visit perfectly matches the timeline specified in the question. Other leaders listed visited India at different times in 2010 or other years.

Explanation

The Sixty-first Amendment of the Constitution of India, officially known as the Constitution (Sixty-first Amendment) Act, 1988, lowered the voting age for elections to the Lok Sabha and to the Legislative Assemblies of States from 21 years to 18 years. This was achieved by amending Article 326 of the Constitution, which governs elections to these legislative bodies on the basis of adult suffrage. The amendment received presidential assent on March 27, 1989, and came into force on March 28, 1989, thereby significantly expanding the electorate and democratic participation in India.

Explanation

Phoenix paludosa, commonly known as the mangrove date palm or Hental, is a species of palm endemic to the coastal mangrove ecosystems of South and Southeast Asia. It is highly adapted to saline and estuarine environments, with its distribution primarily restricted to the Sundarbans of India and Bangladesh, the coastal regions of Odisha, the Andaman and Nicobar Islands, and parts of the Indo-China peninsula. Its survival is strictly tied to these specialized coastal wetland habitats.

Explanation

After attaining enlightenment, Gautama Buddha travelled to Sarnath, located near Varanasi. In the Deer Park of Sarnath, he delivered his first sermon to his first five disciples, an event known in Buddhist tradition as the Dharmachakrapravartana, or the Turning of the Wheel of Law. This sermon laid down the core teachings of Buddhism, including the Four Noble Truths and the Eightfold Path.

Explanation

Harisena, who was the court poet and minister of the Gupta Emperor Samudragupta, composed the Allahabad Prasasti, which is also known as the Prayag Prashasti. Written in classical Sanskrit using the Champu style, this inscription is carved on an Ashokan pillar at Allahabad. It provides a detailed account of the military conquests, reign, and personality of Samudragupta, serving as a primary source for the history of the Gupta Empire.

Explanation

Sarat Chandra Chattopadhyay wrote the famous Bengali novel Pather Dabi, which was published in 1926. The novel depicts the journey of a secret revolutionary society of the same name, led by a charismatic protagonist named Sabyasachi, who fights to liberate India from British colonial rule. Because of its strong patriotic undertones and sharp critique of the British Raj, the colonial government banned the book in January 1927.

Explanation

Article 24 of the Indian Constitution, which forms part of the Right against Exploitation under Fundamental Rights, prohibits the employment of children below the age of 14 years in any factory, mine, or other hazardous occupations to protect their health and ensure their safety.

Explanation

During the Tenth Five Year Plan of India (2002–2007), a major priority was given to human development and the enhancement of quality of life. To achieve the monitorable targets in education, health, gender equality, and poverty reduction, the social services sector received the most significant emphasis in terms of actual plan execution. The proposed allocation for social services was 22.8% of the total outlay, and the actual plan expenditure under this sector rose significantly to about 32.22% of the total expenditure, reflecting the maximum boost given to this sector during the plan period.

Explanation

West Bengal shares its eastern boundary with the sovereign nation of Bangladesh and the Indian state of Assam. The extensive international border with Bangladesh forms the major portion of the state's eastern frontier, while Assam is situated adjacent to the eastern edge of the North Bengal region.

Explanation

In West Bengal, the distribution of forest types is closely linked to altitude, especially in the northern Himalayan region. Tropical evergreen and semi-evergreen forests are restricted to the lower elevations of the foothills and plains, specifically below 1000 meters, where warm temperatures and high humidity prevail. As the altitude rises above this limit, the climate cools, leading to a transition from tropical vegetation to subtropical forests between 1000 and 1500 meters, temperate forests from 1500 to 3000 meters, and sub-alpine vegetation at elevations exceeding 3000 meters.

Explanation

Till the commencement of the Tenth Five-Year Plan in 2002, a total of six Annual Plans had been completed in India during periods when regular Five-Year Plans could not be implemented:

Plan Holiday (1966–1969): Three Annual Plans were executed due to severe droughts, the devaluation of the Indian rupee, and the economic aftermath of the Indo-Pakistani War of 1965. Rolling Plan Period (1979–1980): One Annual Plan was executed during the political transition after the Janata Party government terminated the Fifth Plan early. Economic Crisis Period (1990–1992): Two Annual Plans were implemented due to acute political instability at the Centre and a severe balance of payments crisis.

Adding these together (3 + 1 + 2) yields a total of six completed Annual Plans.

Explanation

Haldia is a prominent industrial city and major seaport located at the meeting point of the Haldi River and Hooghly River in the Purba Medinipur district of West Bengal. It serves as the primary hub for petrochemical industries in eastern India. The city's industrial base is anchor-funded by mega-projects such as the Haldia Petrochemicals Limited complex and the Indian Oil Corporation Limited refinery, which together support a vast network of downstream plastic, polymer, and chemical manufacturing industries in the region.

Explanation

Ceratophyllum, commonly known as hornwort or coontail, is a genus of completely submerged aquatic plants. It is uniquely characterized by the total absence of roots, even during its embryonic stage. Instead of roots, it absorbs nutrients directly from the water through its stems and highly divided leaves. The plant either floats freely in the water or anchors itself to the bottom muddy substrate using modified, root-like leaves.

Explanation

Darjeeling is the most ideal region for tea cultivation in West Bengal due to its unique agro-climatic conditions. The high-altitude hilly terrain, ranging from 600 to 2000 meters above sea level, provides well-drained acidic loamy soils that prevent waterlogging, which is harmful to tea plant roots. The region experiences a cool and humid climate with abundant rainfall, along with frequent mists and fog. These specific geographic and atmospheric conditions slow down the growth of the tea leaves, allowing them to develop the highly prized and distinctive muscatel flavor and aroma that makes Darjeeling tea world-famous.

Explanation

James Watson and Francis Crick deduced the double-helix structure of deoxyribonucleic acid (DNA) in 1953. Their model, which was built upon crucial X-ray diffraction data gathered by Rosalind Franklin and Maurice Wilkins, demonstrated how two complementary polynucleotide chains run in opposite directions and are held together by hydrogen bonds between specific base pairs. This structural breakthrough explained the molecular mechanism of genetic replication and inheritance, earning Watson, Crick, and Wilkins the Nobel Prize in Physiology or Medicine in 1962.

Explanation

Vulcanisation is a chemical process used to improve the physical properties of natural rubber. Raw natural rubber is soft, sticky, and possesses low tensile strength and elasticity. When heated with approximately 3 to 5 percent sulfur, the sulfur atoms form cross-links or disulfide bridges between the linear polyisoprene polymer chains. This three-dimensional cross-linked network restricts the chain slippage, which drastically enhances the rubber's tensile strength, elasticity, durability, and resistance to temperature variations.

Explanation

Alberuni, the famous eleventh-century Persian scholar and polymath, wrote Tahqiq-i-Hind, which is also commonly referred to as Kitab-ul-Hind. Having accompanied Sultan Mahmud of Ghazni to the Indian subcontinent, he spent several years studying Sanskrit, Hindu philosophy, science, and religion. His work Tahqiq-i-Hind, written in Arabic, provides a highly detailed, objective, and systematic account of Indian society, culture, literature, science, and religious beliefs of that period.

Explanation

The Aravalli Range is one of the oldest fold mountain systems in the world, originating during the Precambrian era, approximately 1.5 to 2.5 billion years ago. The geological structure of the Aravallis consists of highly metamorphosed Archean rocks, such as gneisses, schists, and quartzites. These ancient crystalline basement rocks represent the earliest phases of crustal deformation and tectonic activity on the Indian subcontinent, making this region host to the oldest rocks in India.

Explanation

The state of Andhra (later renamed Andhra Pradesh) was created on October 1, 1953, as the first linguistic state in independent India. It was carved out of the Telugu-speaking northern districts of Madras State following intense public agitation and the 58-day fast-unto-death by the activist Potti Sreeramulu who demanded a separate state for Telugu-speaking people. This event ultimately led to the appointment of the States Reorganisation Commission in December 1953 to recommend the nationwide reorganization of state boundaries on a linguistic basis.

Explanation

The McMahon Line is the demarcation line negotiated between Tibet and Great Britain at the Simla Accord of 1914. Named after Sir Henry McMahon, who was the foreign secretary of British India and the chief negotiator of the conference, it defines the boundary between the northeastern region of India and Tibet. India considers this line to be its official, legally binding international border with China in the eastern sector, running from the eastern border of Bhutan to the Isu Razi Pass on the Myanmar border.

Explanation

During embryonic development, the ectoderm is the outermost of the three primary germ layers. It gives rise to the entire nervous system, including the brain, spinal cord, and peripheral nerves, as well as the epidermis of the skin. The process of neural tube formation, known as neurulation, begins when a portion of the ectoderm differentiates into the neural plate, which then folds to form the neural tube and neural crest cells, eventually giving rise to all nerve cells.

Explanation

Amino acids are the organic compounds that combine to form proteins, which are vital for various physiological processes in living organisms. While hundreds of amino acids exist in nature, there are exactly 20 standard amino acids that are universally encoded by the genetic code to synthesize proteins in almost all living beings. These 20 proteinogenic amino acids are classified into essential and non-essential amino acids, playing a fundamental role in the structure and function of cells.

Explanation

The group containing crayfish, cuttlefish, and hagfish is unmatching because these organisms belong to three completely different taxonomic phyla. Crayfish is a crustacean belonging to the phylum Arthropoda. Cuttlefish is a cephalopod belonging to the phylum Mollusca. Hagfish is a primitive jawless vertebrate belonging to the phylum Chordata. These organisms do not share a common phylum, making this group taxonomically diverse and unmatched.

Explanation

Bindusara, the second Mauryan emperor and the father of Ashoka the Great, was referred to as Amitraghata in Sanskrit literature, which translates to slayer of enemies or destroyer of foes. Greek historians and writers, including Strabo and Athenaeus, transliterated this title into Greek as Amitrochates or Allitrochades, reflecting his reputation as a powerful military leader who consolidated and expanded the vast Mauryan empire inherited from his father, Chandragupta Maurya.

Explanation

Regur soil, also known as black soil, is highly favorable for cotton cultivation due to its high clay content and exceptional moisture retention capacity. It is rich in soil nutrients such as calcium carbonate, magnesium, potash, and lime. During the dry season, it develops deep cracks, which facilitate proper aeration of the soil, a unique property often referred to as self-ploughing. This makes it ideal for growing cotton, especially in the Deccan trap region of India.

Explanation

Lord Cornwallis is regarded as the Father of Civil Services in India. During his tenure as Governor-General from 1786 to 1793, he reformed, organized, and institutionalized the civil services to curb corruption and improve administrative efficiency. He separated the commercial and executive branches of the administration, raised the salaries of administrative officers, and strictly prohibited them from engaging in private trade or accepting bribes and presents. His administrative reforms established a highly structured and professional body of administrators, initially known as the Covenanted Civil Services, which laid the foundation for the modern Indian Civil Service.

Explanation

During the southwest summer monsoon, the monsoon winds divide into two branches: the Arabian Sea branch and the Bay of Bengal branch. Due to its geographical location in eastern India, West Bengal primarily receives its monsoon rainfall from the Bay of Bengal current. This branch of the monsoon moves northwards over the warm waters of the Bay of Bengal, picking up abundant moisture before striking the plains of West Bengal and the surrounding regions, resulting in widespread rainfall across the state from June to September.

Explanation

Satish Dhawan Space Centre, formerly known as the Sriharikota Range, is the primary orbital launch site of the Indian Space Research Organisation. It is situated on the barrier island of Sriharikota in Andhra Pradesh. The facility was renamed in 2002 to honor Satish Dhawan, the former chairman of ISRO. Its geographic location on the east coast of India provides an excellent launch azimuth for polar and equatorial orbits, leveraging the Earth's eastward rotation.

Explanation

The coding pattern between EGIK and FILO involves increasing positional shifts in the English alphabet: E shifted by 1 position becomes F. G shifted by 2 positions becomes I. I shifted by 3 positions becomes L. K shifted by 4 positions becomes O.

Following the same systematic pattern of adding 1, 2, 3, and 4 to the positions of the letters in the sequence FHJL yields: F shifted by 1 position becomes G. H shifted by 2 positions becomes J. J shifted by 3 positions becomes M. L shifted by 4 positions becomes P.

This gives the sequence GJMP.

Explanation

The Narmada River flows westward through a prominent rift valley, which is a structural fault trough or graben created by tectonic downfaulting of the Earth's crust. This trough is bounded by the Vindhya Range to the north and the Satpura Range to the south. Because the river is confined within this narrow, hard rocky rift valley, its course is exceptionally straight and it is prevented from forming extensive alluvial plains or meanders.

Explanation

The Nasik Prasasti is a key historical inscription of the Satavahana dynasty located in the Pandavleni Caves near Nashik, Maharashtra. Written in Prakrit, the inscription serves as a detailed posthumous eulogy recounting the grand military conquests, administrative prowess, and religious contributions of Gautamiputra Satakarni. Although it was physically commissioned by his mother, Gautami Balasri, during the reign of his successor Vasisthiputra Pulumavi, the document is universally identified with Gautamiputra Satakarni as it glorifies his reign. The inscription describes his historic victory over the Western Kshatrapa ruler Nahapana, which restored the prestige of the Satavahana dynasty, and lists the expansive territories under his control. It also refers to him with celebrated titles such as Ekabrahmana (peerless Brahmin) and Tri-samudra-toya-peeta-vahana (one whose horses drank the water of three oceans).

Explanation

Ghiyasuddin Mahmud Shah (reigned 1533–1538 CE) was the last sultan of the Hussain Shahi dynasty of Bengal. His reign came to an end when Sher Shah Suri invaded Bengal, captured the capital city of Gaur in 1538 CE, and established Afghan Suri rule in the region. This marked the end of the independent Bengal Sultanate before the region became a territory contested between the Suris and the Mughal Empire.

Explanation

Firuz Shah Tughlaq created the Diwan-i-Bandagan, a separate department dedicated entirely to the welfare, administration, and recruitment of slaves. He possessed a keen interest in collecting slaves, whose numbers grew to approximately 180,000 during his reign. These slaves were provided with education, trained in various crafts and trades, and deployed in royal workshops, administration, and the military.

Explanation

The positional values of the letters in the English alphabetical order are G = 7, H = 8, J = 10, and M = 13.

The difference between the consecutive terms increases progressively by 1: 7 + 1 = 8 (H) 8 + 2 = 10 (J) 10 + 3 = 13 (M)

Following this arithmetic pattern, the next term is obtained by adding 4 to the positional value of M: 13 + 4 = 17

The letter corresponding to the positional value 17 is Q.

Continuing the pattern to verify the final term, adding 5 to 17 yields 22, which corresponds to the letter V.

Explanation

Chittaranjan is famous for the Chittaranjan Locomotive Works (CLW), which is a premier state-owned locomotive manufacturing unit of the Indian Railways. Established in 1950, the industrial township and the plant were named after the prominent Indian freedom fighter Chittaranjan Das. The production of steam locomotives at CLW commenced on 26 January 1950, the day India became a Republic. Over the years, the facility transitioned from producing steam locomotives to manufacturing diesel and eventually state-of-the-art electric locomotives, making it one of the largest locomotive manufacturing units in the world.

Explanation

The given series consists of the squares of consecutive odd numbers: 25 = 5² 49 = 7² 81 = 9² 121 = 11² 169 = 13²

Among the bases of these squares, the numbers 5, 7, 11, and 13 are prime numbers, whereas 9 is a composite number. Consequently, 81 is the square of a composite number, while all other terms in the series are squares of prime numbers.

Explanation

Duncan Passage is a strait in the Indian Ocean that measures approximately 48 kilometers in width. It separates South Andaman, specifically Rutland Island, to the north from Little Andaman to the south. It is situated within the Union Territory of Andaman and Nicobar Islands and functions as a significant maritime pathway connecting the Bay of Bengal with the Andaman Sea.

Explanation

Durgapur Steel Plant is located in the Damodar Valley region of West Bengal. The Damodar Valley, rich in coal and mineral resources and a hub of heavy industries, is widely known as the "Ruhr of India", mirroring the industrial importance of Germany's Ruhr region.

Explanation

The resolving limit of the unaided human eye is approximately 0.1 millimeters. Since 1 millimeter is equal to 1000 microns, 0.1 millimeters translates directly to 100 microns. Any object or cell with a size smaller than this threshold cannot be resolved as a distinct entity by human vision without magnification. This makes 100 microns the minimum size required for a cell, such as the human ovum, to be visible to the naked eye.

Explanation

Sal (Shorea robusta) is a dominant tree species found in the tropical deciduous forests of India, particularly in the moist deciduous forest regions. These forests thrive in areas receiving annual rainfall between 100 cm and 200 cm, covering the foothills of the Himalayas, eastern slopes of the Western Ghats, and states like Jharkhand, Odisha, and Chhattisgarh. Sal trees characteristically shed their leaves during the dry spring and summer seasons to prevent water loss through transpiration, which is a defining trait of deciduous vegetation.

Explanation

The Lion Capital of Ashoka, which serves as the national emblem of India and is featured on Indian currency notes and coins, was discovered at Sarnath, near Varanasi in Uttar Pradesh. It was originally erected around 250 BCE during the reign of the Mauryan Emperor Ashoka to mark the sacred site where Gautama Buddha delivered his first sermon, known as the Dharmachakrapravartana.

The sculpture, carved from a single block of highly polished Chunar sandstone, depicts four Asiatic lions standing back-to-back on a circular abacus. Below the lions, the abacus is decorated with carvings of an elephant, a galloping horse, a bull, and a lion in high relief, separated by intervening wheels (Dharma Chakras), resting atop a bell-shaped lotus. The capital was excavated in 1904–1905 by Friedrich Oscar Oertel during archaeological excavations at Sarnath.

Explanation

The gastric glands located in the mucosa of the stomach wall secrete gastric juice, which contains hydrochloric acid, mucus, and pepsinogen. Pepsinogen is an inactive proenzyme that is converted into the active proteolytic enzyme pepsin when it comes into contact with hydrochloric acid. Pepsin is responsible for initiating the digestion of dietary proteins by breaking them down into smaller peptides and peptones within the highly acidic environment of the stomach.

Explanation

The National Development Council (NDC) is the apex body responsible for giving the final approval to the draft Five Year Plans in India. Established on August 6, 1952, to strengthen and mobilize the effort and resources of the nation in support of the Plan, the NDC comprises the Prime Minister, Union Cabinet Ministers, Chief Ministers of all States, and representatives of the Union Territories. After the Planning Commission prepares the draft of a Five Year Plan, it is submitted to the NDC for final review and approval to ensure cooperative federalism and consensus in national development.

Explanation

The genus Trentepohlia, misspelled as Terentepohlia in the options, represents a group of filamentous green algae that are exclusively terrestrial or subaerial. These organisms grow on land on various substrates such as tree bark, wet rocks, damp soils, and old walls, rather than in aquatic habitats. To survive the desiccation and high light intensity of terrestrial environments, they accumulate large amounts of carotenoid pigments, particularly beta-carotene, which gives them a characteristic bright orange, yellow, or reddish-brown color instead of the typical green.

Explanation

Serena Williams of the USA won the women's singles title at the 2010 Australian Open by defeating Justine Henin of Belgium in the final. She won the match in three sets with a score of 6-4, 3-6, 6-2 to secure her fifth Australian Open singles title and twelfth Grand Slam singles title overall.

Explanation

In the summer season, nitrogen dioxide (NO₂) and methane (CH₄) in the stratosphere react with chlorine monoxide (ClO^•) and chlorine atoms (Cl^•) to form stable chlorine reservoirs (or sinks), such as chlorine nitrate (ClONO₂) and hydrogen chloride (HCl). This temporarily halts major ozone depletion.

During the cold winter months over Antarctica, unique polar stratospheric clouds (PSCs) form. The surfaces of these ice particles facilitate heterogeneous reactions where chlorine nitrate is hydrolyzed to produce hypochlorous acid (HOCl) and reacts with hydrogen chloride to produce molecular chlorine (Cl₂):

ClONO₂(g) + H₂O(s) → HOCl(g) + HNO₃(s) ClONO₂(g) + HCl(s) → Cl₂(g) + HNO₃(s)

When sunlight returns in the spring, the heat and ultraviolet radiation photolyze HOCl and Cl₂ to generate highly reactive chlorine free radicals. These radicals catalytically break down ozone molecules into oxygen, resulting in the rapid depletion of the ozone layer. Thus, the reservoir compound chlorine nitrate is central to the chemical pathway of ozone hole formation.

Explanation

The Champaran Satyagraha of 1917 was Mahatma Gandhi's first satyagraha and mass-mobilization movement in India. Upon the invitation of Raj Kumar Shukla, Gandhi visited Champaran in Bihar to investigate the plight of the local peasants who were forced by European planters to cultivate indigo on three-twentieths of their land under the exploitative tinkathia system. Gandhi's peaceful resistance, inquiries, and negotiations successfully forced the administration to abolish the tinkathia system and refund a portion of the illegally extracted money to the peasants, establishing this campaign as his first successful demonstration of civil disobedience and mass movement in the country.

Explanation

Under Article 100(1) of the Constitution of India, the Speaker of the Lok Sabha does not vote in the first instance on any matter. Instead, the Speaker exercises a casting vote only in the case of an equality of votes to resolve a deadlock. This constitutional provision ensures the impartiality and neutrality of the Speaker's office while presiding over the proceedings of the House.

Explanation

The operator mappings are defined as follows: Division symbol ÷ (represented as ± in the question text) stands for multiplication (×) Multiplication symbol × stands for addition (+) Addition symbol + stands for subtraction (-) Subtraction symbol - stands for division (÷)

Substituting these into the expression 16 × 3 + 5 - 2 ÷ 4 (where the final operator is ÷, represented as + in the text) gives:

16 + 3 - 5 ÷ 2 × 4

According to the BODMAS rule, division is performed first: 5 ÷ 2 = 2.5

The expression becomes: 16 + 3 - 2.5 × 4

Next, performing multiplication yields: 2.5 × 4 = 10

The expression becomes: 16 + 3 - 10

Performing addition gives: 16 + 3 = 19

Finally, performing subtraction results in: 19 - 10 = 9

Explanation

Mahatma Gandhi was a staunch opponent of the partition of India on communal lines. On March 3, 1947, during a conversation with Maulana Abul Kalam Azad prior to meeting Viceroy Lord Mountbatten, Gandhi expressed his deep-seated conviction for a united India by stating that if the Congress wished to accept partition, it would be over his dead body. He firmly believed that the division of the nation was a spiritual and physical tragedy, and he consistently advocated for Hindu-Muslim unity throughout his life.

Explanation

Satellite imageries are the primary and most effective tool for tracking, monitoring, and studying tropical cyclones in the Bay of Bengal. Meteorological satellites provide real-time, high-resolution thermal infrared, visible, and water vapor images of the earth's surface and atmosphere. These imageries allow meteorologists to observe the formation of cyclonic disturbances, pinpoint the location of the cyclone's eye, estimate the intensity of winds using techniques like the Dvorak method, and accurately predict the landfall and movement trajectory of the system.

Explanation

The prime factorization of 75 is 3 × 5². For n! to be divisible by 75, the prime factors of 75 must be present in the prime factorization of n!. This means n! must contain at least one factor of 3 and at least two factors of 5.

The prime 5 appears in the factorization of n! at multiples of 5. To obtain at least two factors of 5, the product 1 × 2 × … × n must include at least two multiples of 5, which are 5 and 10. Consequently, n must be at least 10.

For n = 10, the factorial 10! includes the numbers 5 and 10, contributing 5 × (2 × 5) = 2 × 5², which provides the necessary 5². Additionally, 10! contains multiple factors of 3 from 3, 6, and 9. Thus, 10! is divisible by 3 × 5² = 75, making 10 the least positive integer that satisfies the condition.

Explanation

During the reign of Shams ud-Din Iltutmish, the Mongol ruler Genghis Khan reached the borders of India in 1221. He was pursuing Jalal ad-Din Mingburnu, the crown prince of Khwarazm, who had fled towards India after his defeat. Jalal ad-Din sought asylum from Iltutmish. Recognizing the immense threat posed by the Mongol forces, Iltutmish tactfully refused shelter to the Khwarazmian prince on the pretext that the climate of Delhi would not suit him. Consequently, Genghis Khan did not cross the River Indus into the Delhi Sultanate, effectively saving India from a major Mongol invasion.

Explanation

The Ilbert Bill was introduced in the Imperial Legislative Council on 9 February 1883 during the viceroyalty of Lord Ripon. Drafted by Sir Courtenay Ilbert, who was the legal member of the Viceroy Executive Council, this bill aimed to remove judicial disqualifications based on race by permitting senior Indian magistrates and session judges to try European British subjects.

Explanation

The Sarkaria Commission was set up in June 1983 by the Government of India under the chairmanship of Justice Ranjit Singh Sarkaria, a retired judge of the Supreme Court of India. Its primary mandate was to review the working of the existing arrangements between the Union and the States in all spheres and recommend appropriate changes and measures within the constitutional framework. The commission submitted its comprehensive report in 1988 with 247 recommendations aimed at improving cooperative federalism, the appointment and role of Governors, and the application of Article 356.

Explanation

Let the standard directions be represented by angles measured clockwise from North, where North is 0°, North-East is 45°, East is 90°, South-East is 135°, South is 180°, South-West is 225°, West is 270°, and North-West is 315°.

The transformation maps South-East (135°) to North (0°). This is a counter-clockwise rotation of 135°:

135° - 135° = 0°

The same rotation maps North-East (45°) to West (270°):

45° - 135° = -90° ≡ 270°

Applying this 135° counter-clockwise rotation to East (90°) gives:

90° - 135° = -45° ≡ 315°

An angle of 315° corresponds to North-West.

Explanation

Severe Cyclonic Storm Aila was a highly destructive tropical cyclone that formed in the Bay of Bengal in late May 2009. The storm made landfall on May 25, 2009, near Sagar Island in West Bengal, bringing intense rainfall and wind speeds of up to 120 km/h. It caused widespread devastation across the districts of South Bengal, particularly the South 24 Parganas and North 24 Parganas, heavily impacting the Sundarbans region with severe storm surges and flooding.

Explanation

According to the definitions established by the Census of India, urban areas are classified into six categories based on their population size. Any urban settlement that crosses a population threshold of 100,000 is categorized as a Class I town, which is officially designated as a city. This distinction sets it apart from smaller urban settlements that do not meet this population threshold.

Explanation

Brass is a substitutional alloy consisting of copper and zinc. The proportions of zinc and copper can be varied to create a range of brasses with diverse mechanical and electrical properties. Copper acts as the base metal, typically making up about 55% to 95% of the alloy by weight, while zinc is added to increase strength and ductility.

Explanation

Ibn Batuta, the famous Moroccan scholar and traveler, arrived in India through the passes of the Hindu Kush in 1333 AD. He reached Delhi during the reign of Sultan Muhammad bin Tughlaq, who ruled the Delhi Sultanate from 1325 to 1351 AD. Impressed by Ibn Batuta's scholarly credentials and knowledge of Islamic law, the Sultan appointed him as the Qazi (judge) of Delhi, a position he held for several years before being sent as the Sultan's envoy to China.

Explanation

The Farakka Barrage was constructed across the Ganges River in Murshidabad district of West Bengal to divert Ganges water into the Bhagirathi-Hooghly river system via a feeder canal. The primary objective of this diversion is to increase the flow of water in the Hooghly River, which helps flush out the accumulated silt and sediment from the riverbed. This flushing action maintains the necessary depth and draft required for the navigation of ships, thereby ensuring the survival and operational viability of the Kolkata Port.

Explanation

Under Article 280 of the Constitution of India, the President of India is required to constitute the Finance Commission at the expiration of every fifth year, or at such earlier time as the President considers necessary. The Finance Commission is a quasi-judicial body that recommends the distribution of financial resources, specifically the net proceeds of taxes, between the Union Government and the State Governments, as well as the allocation of these proceeds among the States themselves.

Explanation

Assam, ruled by the Ahom dynasty, remained completely independent during the reign of Akbar. While Akbar successfully expanded the Mughal Empire across northern, western, and eastern India, his territorial conquests did not extend into the Brahmaputra Valley of Assam. The Ahom kingdom consistently maintained its sovereignty and successfully resisted any foreign incursions during this period, keeping Assam outside of Mughal control throughout Akbar's rule.

Explanation

The Raichur Doab, a highly fertile region lying between the Krishna River to the north and the Tungabhadra River to the south, was the primary territory of conflict between the Vijayanagar Empire and the Bahmani Sultanate. Both empires constantly vied for control over this agriculturally rich land to bolster their revenues and establish strategic dominance over the Deccan plateau, leading to a succession of wars throughout the fourteenth and fifteenth centuries.

Explanation

Qutbuddin Aibak, the founder of the Mamluk (Slave) Dynasty of the Delhi Sultanate, started the construction of the Qutb Minar in Delhi around 1199 AD. He commissioned the construction of this monumental minaret in honor of the revered Sufi saint Qutbuddin Bakhtiyar Kaki. Under his reign, the foundation and the first storey of this iconic red sandstone tower were completed.

Explanation

The Indigo Revolt, also known as the Nil Bidroha, was a major peasant uprising that began in Bengal in autumn 1859. The rebellion started in the village of Chaugacha in Nadia district under the leadership of Bishnucharan Biswas and Digambar Biswas. It was a direct protest against the highly oppressive and exploitative system of forced indigo cultivation imposed by European planters. The movement quickly spread across several districts of Bengal, with local farmers refusing to sow indigo, boycotting the planters, and physically resisting the armed forces of the factories.

Explanation

According to the West Bengal Human Development Report, Purulia district consistently records the lowest Human Development Index among the districts of West Bengal. This trend was evident around the 2011 exam year.

Explanation

The angle θ between the hour hand and the minute hand of a clock at H hours and M minutes is given by the standard formula:

θ = |30H - 11/2 M|

For the given time 9:30 hrs., we have H = 9 and M = 30. Substituting these values into the formula:

θ = |30 × 9 - 11/2 × 30|

θ = |270 - 11 × 15|

θ = |270 - 165| = 105°

Explanation

The University of Calcutta was established on 24 January 1857. It was founded as the first multidisciplinary and Western-style modern university in Asia, following the recommendations of Wood's Despatch of 1854 which suggested creating universities in India modeled on the University of London. The Calcutta University Act of 1857 was passed to incorporate the institution, and Lord Canning, the then Governor-General of India, served as its first Chancellor.

Explanation

Canal irrigation is the second most important source of irrigation in India, accounting for about twenty-six percent of the total irrigated area in the country. It is highly effective and extensively developed in areas characterized by flat terrain, deep fertile alluvial soils, and perennial river sources. These conditions are predominantly found in the Great Plains of Northern India, encompassing states like Punjab, Haryana, and Uttar Pradesh, as well as the coastal deltaic tracts of South India. Canals are categorized into inundation canals, which supply water only when rivers are in flood, and perennial canals, which draw water from permanent reservoirs or barrages to ensure a continuous water supply throughout the year.

Explanation

The Koyna Hydroelectric Project is the largest completed hydroelectric power plant in India, with a total installed capacity of 1960 MW. Located in the Satara district of Maharashtra, the project utilizes the water of the Koyna River, a major tributary of the Krishna River. It consists of four stages of power generation, with the first three stages constructed underground and the fourth stage completed in 1999 to add 1000 MW of capacity. This project plays a vital role in meeting the peak electricity demand of Maharashtra.

Explanation

In 1704, Murshid Quli Khan, who was then the Diwan of Bengal, shifted his administrative headquarters from Dacca to Mukhsusabad to escape political conflicts with the subahdar, Prince Azim-us-Shan. He subsequently renamed the city Murshidabad after himself. In 1717, when he was officially appointed as the Nawab of Bengal by the Mughal Emperor Farrukhsiyar, Murshidabad became the formal capital of the Bengal Subah, serving as the administrative and financial hub of the region.

Explanation

During the Revolt of 1857, Bahadur Shah Zafar, the last Mughal emperor, was proclaimed the symbolic leader of the uprising by the sepoys. Following the British recapture of Delhi in September 1857, he was captured by Major William Hodson at Humayun's Tomb. The British subsequently tried him for treason, mutiny, and murder at the Red Fort. He was convicted and exiled to Rangoon in Burma as a state prisoner, where he remained in British custody until his death in 1862.

Explanation

When two trains cross each other moving in opposite directions, the total distance covered is the sum of their individual lengths: D = 200 m + 200 m = 400 m

Let the speed of each train be v. Since they are moving in opposite directions, their relative speed is the sum of their individual speeds: Vᵣₑₗ = v + v = 2v

Using the formula: Speed = (Distance)/(Time)

We substitute the values into the equation: 2v = (400 m)/(10 s) 2v = 40 m/s v = 20 m/s

To convert the speed from m/s to km/hr, we multiply by the conversion factor ¹⁸⁄₅: v = 20 × ¹⁸⁄₅ = 72 km/hr

Explanation

The primary photosynthetic pigments, chlorophyll a and chlorophyll b, absorb light most efficiently in the red and blue regions of the visible light spectrum. Green light is largely reflected and transmitted by these pigments, which is why plant leaves appear green. Because the chloroplasts absorb a negligible amount of green light, the rate of photosynthesis is at its lowest under green light.

Explanation

International Women's Day is celebrated globally on March 8 every year to honor the social, economic, cultural, and political achievements of women. The day also marks a call to action for accelerating women's equality. The United Nations officially recognized the day in 1977, though its origins date back to the early 20th century labor movements in North America and Europe.

Explanation

The foothill region of the Himalayas in West Bengal is known as the Terai and Duars. This region lies at the base of the outer Himalayas, where the Teesta river divides it into two distinct parts: the Terai region lies to the west of the Teesta, while the Duars region lies to the east. This entire zone forms a belt of low-lying plains, rich alluvial soils, marshy grasslands, and dense subtropical forests.

Explanation

Maharashtra is the most industrially advanced state in India, leading the country in terms of industrial output and contribution to the national Gross Domestic Product (GDP). The state boasts a highly developed infrastructure, which includes a vast network of highways, railways, and major seaports like Jawaharlal Nehru Port Trust and Mumbai Port that facilitate seamless trade and logistics.

It features prominent industrial corridors and belts such as the Mumbai-Pune industrial region, Nashik, Aurangabad, and Nagpur. These hubs support a diverse industrial base comprising manufacturing, automobiles, pharmaceuticals, chemicals, petrochemicals, engineering, and information technology. Additionally, Maharashtra consistently ranks at the top in attracting Foreign Direct Investment inflows, driven by its favorable industrial policies, availability of a skilled workforce, and business-friendly ecosystem.

Explanation

Article 54 of the Constitution of India states that the President is elected by an electoral college consisting of the elected members of both Houses of Parliament (the Lok Sabha and the Rajya Sabha) and the elected members of the Legislative Assemblies of the States, including the Union Territories of Delhi and Puducherry. Nominated members of either Parliament or the State Assemblies are excluded from this electoral college to ensure that only the elected representatives of the people and the states participate in electing the Head of State.

Explanation

The required number N leaves a remainder of 3 when divided by 4, 9, or 12. This means that N - 3 is a multiple of the Least Common Multiple (LCM) of 4, 9, and 12.

The LCM of 4, 9, and 12 is calculated as: LCM(4, 9, 12) = 36

Thus, the number can be expressed in the form: N = 36k + 3 (where k is a positive integer)

Since the number must be divisible by 7: 36k + 3 ≡ 0 (mod 7)

By simplifying the coefficient of k modulo 7: 36 ≡ 1 (mod 7)

Substituting this back gives: 1k + 3 ≡ 0 (mod 7) k ≡ 4 (mod 7)

The smallest positive integer value for k that satisfies this condition is 4. Substituting k = 4 into the equation for N: N = 36(4) + 3 = 144 + 3 = 147

Explanation

Gopala was elected as the king by the local chieftains of Bengal around 750 AD to end a long period of political chaos and anarchy known as Matsyanyaya. By establishing his rule, he founded the Pala dynasty, which went on to rule Bengal and Bihar for nearly four centuries, ushering in a golden age of stability, prosperity, and Buddhist art and learning in the region.

Explanation

The Royal Indian Navy (RIN) Revolt, also known as the Bombay Mutiny, commenced on February 18, 1946. It initiated as a strike by the ratings of the non-commissioned shore establishment HMIS Talwar in Bombay to protest against racial discrimination, low pay, poor quality of food, and difficult working conditions. The uprising quickly gained momentum, spreading to over seventy ships and numerous shore establishments across India, and received immense support from the civilian population in Bombay.

Explanation

The first premise states that an atmosphere is a necessary condition for human survival. The second premise establishes that the moon does not have an atmosphere. By combining these two premises, since the moon lacks the necessary condition required for human survival, it logically follows that man cannot live on the moon.

Explanation

The economic reforms initiated in 1991 introduced liberalisation to dismantle the regulatory controls of the License Raj and integrate India into the global economy.

The liberalisation process contemplated and implemented in the 1990s included:

The abolition of industrial licensing for almost all industries, except for a tiny list of strategic and hazard-related sectors.

The systematic dereservation or deregistration of items from the Small Scale Industries (SSI) list to enable larger firms to manufacture these products, enhance production scale, and improve technological efficiency.

The elimination of pre-entry scrutiny and investment limits on large houses by amending the Monopolies and Restrictive Trade Practices (MRTP) Act, effectively withdrawing major restrictions on expansion, mergers, and acquisitions.

Explanation

Arunachal Pradesh was historically known as the North-East Frontier Agency (NEFA). It was a political division under the administration of the Ministry of External Affairs during British India and later in independent India until 1972. On January 20, 1972, it was reconstituted as the Union Territory of Arunachal Pradesh and subsequently attained full statehood on February 20, 1987.

Explanation

The Landholders Society, also known as the Zamindary Association, was founded in Calcutta in July 1838 by Dwarkanath Tagore, Prasanna Kumar Tagore, and Radhakanta Deb. It is recognized as the first political association or society established under British rule in India. The society was formed to defend and promote the interests of the landlords through constitutional and legal means, marking the beginning of organized political activity in the country.

Explanation

Dakshin Gangotri was established as India's first permanent scientific research station in Antarctica during the third Indian Antarctic Expedition in 1983–84. Located on the Ice Shelf of Queen Maud Land in Antarctica, the station was used to conduct multi-disciplinary scientific research in fields such as geology, glaciology, meteorology, and oceanography. It functioned as an active base until 1990, when it was decommissioned after being submerged under ice, and subsequently designated as a historical site.

Explanation

We can determine the father's age at marriage using the relationships between the present ages of the family members.

Let the present age of Ram be R, his mother be M, and his father be F.

The problem states that Ram is presently 16 years old: R = 16

Ram's mother is 25 years older than Ram: M = R + 25 = 16 + 25 = 41 years

Ram's father is 6 years older than his mother: F = M + 6 = 41 + 6 = 47 years

Ram was born 4 years after his parents' marriage. Since Ram is currently 16 years old, the marriage took place 4 years before his birth, which was 20 years ago: 16 + 4 = 20 years ago

To find the father's age at the time of marriage, we subtract the duration of the marriage from the father's present age: 47 - 20 = 27 years

Explanation

The standard relation to find the real time from a mirror image time is to subtract the given time from 11:60 when the time is between 1:00 and 11:00, and from 23:60 when the time is between 11:00 and 1:00.

Since the given mirror time is 12:40, we subtract it from 23:60:

23:60 - 12:40 = 11:20

This direct calculation yields the correct real time.

Explanation

The famous slogan Inquilab Zindabad, which translates to Long Live the Revolution, was popularized during the Indian independence movement by the revolutionary leader Bhagat Singh. Although originally coined by the Urdu poet and freedom fighter Maulana Hasrat Mohani in 1921, it was Bhagat Singh and his associates in the Hindustan Socialist Republican Association who made it a household cry across India. Bhagat Singh famously raised this slogan after throwing bombs into the Central Legislative Assembly in Delhi on April 8, 1929, forever associating his name and the revolutionary struggle with these iconic words.

Explanation

Kranz anatomy is a specialized leaf structure characteristic of C4 plants that utilize the C4 photosynthetic pathway. In these plants, the vascular bundles are surrounded by a distinct ring of large bundle sheath cells, which in turn are surrounded by mesophyll cells, forming a wreath-like arrangement (Kranz means wreath in German). This unique anatomical adaptation is essential for the spatial separation of initial carbon dioxide fixation in the mesophyll cells and the final reduction of carbon dioxide in the bundle sheath cells, effectively driving the C4 cycle and minimizing photorespiration.

Explanation

The first Indian National Conference was organized by the Indian Association under the leadership of Surendranath Banerjee and Ananda Mohan Bose in Calcutta in December 1883. Prior to the conference, in July 1883, a massive effort was launched to raise a National Fund intended to support political agitation in India and England. During the historic December 1883 session, resolutions were passed to emphasize the collection of this National Fund to sustain nationalistic endeavors.

Explanation

Article 280 of the Constitution of India mandates the constitution of a Finance Commission by the President of India every five years or earlier. The core responsibility of the Finance Commission is to evaluate the state of finances of the Union and State governments and recommend the distribution of net proceeds of taxes between the Centre and the States, as well as the allocation of these tax proceeds among the States. Additionally, it defines the principles that govern the grants-in-aid of the revenues of the States out of the Consolidated Fund of India.

Explanation

The Gadar Party was formed in 1913 by Indian immigrants in the United States and Canada with the primary objective of securing India's independence from British rule. The party was established in San Francisco, California, which also served as its headquarters, known as the Yugantar Ashram. Under the leadership of key figures like Lala Har Dayal, Sohan Singh Bhakna, and Kanshi Ram, the organization published a weekly nationalist journal titled Gadar, which gave the movement its name and spread revolutionary ideas among Indian expatriates worldwide.

Explanation

During the reign of the Mughal Emperor Jahangir, the English East India Company established its first factories in India. Captain William Hawkins arrived at Jahangir's court in 1608 to seek trade concessions and permission to build a factory. Jahangir issued a royal farman in 1613 that officially permitted the English to establish their first permanent factory at Surat. Prior to this, the English had also set up a temporary trading post at Masulipatnam in 1611, which also occurred during Jahangir's rule.

Explanation

Peroxyacetyl nitrate (PAN) is a powerful phytotoxic air pollutant that directly inhibits the Hill reaction of photosynthesis by damaging chloroplast membranes and interfering with the electron transport chain, thereby reducing ATP and NADPH production. Nitrogen monoxide can also affect photosynthesis, but PAN is a more direct and potent inhibitor of the Hill reaction.

Explanation

Since the 1980s, India experienced a significant economic shift characterized by early deregulation, trade liberalization, and the relaxation of industrial licensing, particularly in the automotive and electronics sectors. Concurrently, rising disposable incomes among the growing urban middle class, alongside the emergence of consumer financing and retail credit, triggered an unprecedented demand for modern lifestyle goods. These factors combined to drive exceptionally high growth rates in the consumer durable goods industries—such as two-wheelers, passenger cars, television sets, and household appliances—outpacing other industrial segments during this period.

Explanation

Using the set theory formula for the union of two sets, the percentage of students who failed in at least one subject is given by:

n(Fail) = n(English) + n(Mathematics) - n(Both)

Substituting the given values:

n(Fail) = 40% + 30% - 15% = 55%

Since 55% of the students failed in at least one subject, the percentage of students who passed in both subjects is:

Pass percentage = 100% - 55% = 45%

Explanation

Let the cost of one orange, one banana, and one apple be Rs. x, Rs. y, and Rs. z respectively.

According to the given conditions, we can set up the following two equations: 2x + 3y + 4z = 15 3x + 2y + z = 10

Adding these two equations gives: 5x + 5y + 5z = 25

Dividing by 5 on both sides: x + y + z = 5

To find the cost of 3 oranges, 3 bananas, and 3 apples, we need to calculate the value of 3x + 3y + 3z, which can be factored as: 3(x + y + z)

Multiplying the simplified equation by 3 yields: 3(x + y + z) = 3 × 5 = 15