Past Questions — 2024

Nettle leaves possess specialized stinging hairs (trichomes) that act like hypodermic needles. When these hairs touch the skin, they inject a cocktail of chemicals, the primary irritant being methanoic acid (also commonly known as formic acid). This acid causes the characteristic burning sensation, pain, and inflammation associated with a nettle sting. Analysis of other options: - b. Citric acid: Found naturally in citrus fruits like lemons and oranges; it is not used as a defense mechanism for stinging. - c. Tartaric acid: Found in grapes and tamarinds; it does not cause stinging sensations. - d. Acetic acid: The primary component of vinegar; while it is an acid, it is not the specific secretion used by nettles for defense.

Raja Ram Mohan Roy is widely regarded as the 'Father of Modern India' and the 'Father of the Indian Renaissance'. He played a pivotal role in introducing modern Western education, rationalism, and social reform to India during the early 19th century. His most significant contributions include the campaign against the practice of Sati (which was abolished in 1829), the founding of the Brahmo Samaj to reform Hinduism, and his advocacy for women's rights and freedom of the press. Why other options are incorrect: - Swami Dayananda Saraswati: He was the founder of the Arya Samaj and focused on returning to the Vedic period ('Back to the Vedas'), but he is not termed the father of modern India. - Sri Aurobindo: He was a philosopher, yogi, and revolutionary, but his contributions were more focused on spiritual evolution and nationalist philosophy. - Bhagat Singh: He was a legendary revolutionary and freedom fighter known for his sacrifice and socialist ideology, but he operated in the political/militant sphere of the independence movement rather than the foundational social-modernization phase.

A conservative force is a force for which the work done in moving a particle between two points is independent of the path taken. A key characteristic of conservative forces is that the work done over any closed loop is zero, and they can be associated with a potential energy function. 1. Electrostatic force (a): This is a conservative force. The work done in moving a charge between two points in an electric field depends only on the initial and final positions, not the path. 2. Magnetic force (b): While the magnetic force acting on a moving charge does no work (since it is always perpendicular to the velocity), in the context of general physics classifications for these types of exams, it is typically grouped with conservative interactions or treated as non-dissipative. However, compared to friction, it does not dissipate energy into heat. 3. Force in an elastic spring (c): This is a conservative force (Hooke's Law). The energy stored in the spring as potential energy can be fully recovered. 4. Frictional force (d): This is a non-conservative (dissipative) force. The work done by friction depends on the total distance traveled (the path length). For example, moving an object from point A to B in a straight line involves less work against friction than moving it in a zig-zag path. Furthermore, the energy lost to friction is converted into thermal energy (heat) and cannot be recovered as mechanical energy. Therefore, frictional force is NOT a conservative force.

The correct answer is Lysozyme. Lysozyme is a glycoside hydrolase enzyme found in secretions such as saliva, tears, and mucus. It acts as a primary defense mechanism of the innate immune system by attacking the cell walls of certain bacteria. Specifically, it catalyzes the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) in peptidoglycan, which causes the bacterial cell wall to rupture (lysis), thereby killing the bacteria. Why other options are incorrect: - a. Ribozyme: These are RNA molecules that have the ability to catalyze specific biochemical reactions, similar to protein enzymes, but they are not antibacterial agents in saliva. - b. Lipase: These are enzymes that break down fats (lipids) into glycerol and fatty acids. While present in saliva (lingual lipase), their function is digestive, not antibacterial. - c. Isomerase: These are enzymes that catalyze the structural rearrangement of isomers (converting one isomer into another) and do not possess antibacterial properties.

According to the Constitution of India, the Governor of a State is appointed by the President of India. However, the oath of office and secrecy is administered by the Chief Justice of the High Court of that respective state. In the absence of the Chief Justice, the senior-most judge of that High Court administers the oath. Analysis of options: - Option (a) Chief Justice of India: Administers the oath to the President of India, not the Governor. - Option (b) President: Appoints the Governor but does not administer the oath. - Option (c) Prime Minister: Has no constitutional role in administering the oath to a Governor. - Option (d) Chief Justice of the High Court: This is the correct constitutional authority for administering the oath to the Governor.

Sardar Vallabhbhai Patel is known as the 'Iron Man of India' due to his uncompromising commitment to national integration and his decisive role in the political integration of over 560 princely states into the Indian Union after independence in 1947. Analysis of other options: - a. Subhas Chandra Bose: Known as 'Netaji', he led the Indian National Army (INA) to fight against British rule. - b. Bipin Chandra Pal: One of the 'Lal-Bal-Pal' trio, he was a key leader of the Swadeshi movement. - c. Lala Lajpat Rai: Also part of the 'Lal-Bal-Pal' trio, known as 'Punjab Kesari'.

Based on the current cabinet allocation of the Government of Mizoram, Pu Vanlalhlana is the Minister in charge of the Power and Electricity Department. Analysis of other options: - Pu Lalduhawma is the Chief Minister of Mizoram and holds various key portfolios, but the specific charge of Power and Electricity is assigned to Pu Vanlalhlana. - Prof. Lalnilawma and Pu F. Rodingliana hold other ministerial portfolios within the state cabinet, but they are not the ministers in charge of Power and Electricity.

To understand the correct answer, it is essential to distinguish between the different terms used for suspending or ending the proceedings of a legislative house: 1. **Adjournment (Option a):** This is a short break in the sitting of the house. It terminates a sitting for a specified time (hours, days, or weeks), but not the session. It is ordered by the presiding officer. 2. **Adjournment sine die (Option b):** 'Sine die' means 'without assigning a day'. This terminates a sitting of the house indefinitely, but it does not terminate the session itself. 3. **Prorogation (Option c):** This is the act of terminating a session of the house. It is done by the head of the state (e.g., the President of India or the Governor of a state). While it ends the session, it does not dissolve the house; pending bills usually do not lapse upon prorogation. 4. **Dissolution (Option d):** This is the most drastic action. It not only terminates the session but also ends the life of the house itself (e.g., the Lok Sabha). After dissolution, fresh elections must be held. Since the question specifically asks what leads to the termination of a 'session' (rather than a 'sitting' or the 'house' itself), Prorogation is the correct technical term.

The Rights of Persons with Disabilities (RPwD) Act, 2016 was enacted by the Government of India to replace the Persons with Disabilities (Equal Opportunities, Protection of Rights and Full Participation) Act, 1995. One of the most significant changes introduced by the 2016 Act was the expansion of the list of recognized disabilities. While the 1995 Act recognized only 7 types of disabilities, the RPwD Act 2016 increased this number to 21. These 21 disabilities include physical disabilities (locomotor, visual, hearing), intellectual disabilities, mental illness, and specific conditions such as leprosy, dwarfism, acid attack victims, and blood disorders like Thalassemia, Hemophilia, and Sickle Cell disease. Therefore, option (d) is correct, and options (a), (b), and (c) are incorrect as they do not reflect the current legal framework established by the 2016 Act.

The Tyndall effect is the phenomenon where a beam of light is scattered by particles in its path, making the beam visible. This occurs when the size of the particles is large enough to deflect the light but small enough to remain suspended. 1. Why Option (d) is correct: Colloidal particles (like milk in water or dust in air) have a size range (typically 1 to 1000 nanometers) that is ideal for scattering visible light. This is the classic definition of the Tyndall effect. 2. Why Option (a) is incorrect: While suspensions also scatter light, the Tyndall effect is specifically used as a characteristic test to distinguish colloids from true solutions. In a suspension, particles are often large enough to block light or settle down, whereas the Tyndall effect is the defining optical property of colloids. 3. Why Option (b) is incorrect: Refraction is the bending of light as it passes from one medium to another; it is not the cause of the Tyndall effect. Furthermore, true solutions do not exhibit the Tyndall effect because their particles are too small to scatter light. 4. Why Option (c) is incorrect: The phenomenon is based on scattering (light being sent in many directions), not simple specular reflection.

Sikkim was made an integral part of India by the 36th Constitutional Amendment Act, 1975, which gave Sikkim the status of a full state and inserted it into the First Schedule of the Constitution. The other options are incorrect because the 39th Amendment dealt with election-related matters, the 40th Amendment with territorial waters and other provisions, and the 42nd Amendment with a wide-ranging constitutional overhaul, not Sikkim’s integration.

The Nilgiri Biosphere Reserve is the first biosphere reserve established in India (1986) and is uniquely spread across three states: Tamil Nadu, Kerala, and Karnataka. Analysis of other options: - b. Achanakmar-Amarkantak: This biosphere reserve is located in the states of Chhattisgarh and Madhya Pradesh (two states). - c. Seshachalam: This is located entirely within the state of Andhra Pradesh (one state). - d. Agasthiyamalai: This is spread across the states of Tamil Nadu and Kerala (two states). Therefore, only the Nilgiri Biosphere Reserve meets the criteria of being spread over three states.

The 'Aarogya Maitri Aid Cube' is the world's first portable hospital, designed to be deployed rapidly in disaster-hit areas or remote locations to provide critical healthcare services. It was officially unveiled on December 2, 2023, in Gurugram, Haryana. The project is a collaborative effort involving the Ministry of External Affairs (India) and other partners to enhance India's capacity for humanitarian assistance and disaster relief (HADR) operations globally. Therefore, option (b) Gurugram is the correct location of the unveiling.

The Attorney General for India is the chief legal advisor to the Government of India and is appointed by the President under Article 76 of the Constitution of India. The primary duties of the Attorney General include giving advice to the Government of India upon legal matters referred by the President and performing other duties of a legal character assigned by the President. Why other options are incorrect: - b. Chief Justice of Supreme Court: The CJI is the head of the judiciary and ensures the administration of justice; they do not act as a legal advisor to the executive branch to maintain the separation of powers. - c. Chairman, Law Commission: The Law Commission is a non-statutory body that recommends reforms in the law of India; it does not provide day-to-day legal advice to the government on specific cases or matters. - d. Chief Information Commissioner: This official heads the Central Information Commission and deals specifically with the Right to Information (RTI) Act, not general legal advisory for the government.

Airbags are designed to inflate almost instantaneously during a collision to protect passengers. This rapid inflation is achieved through a chemical reaction. The primary chemical used in traditional airbag systems is Sodium Azide (NaN3). When a crash is detected, an electrical impulse triggers the decomposition of sodium azide: 2NaN3 → 2Na + 3N2(g). The rapid release of nitrogen gas (N2) fills the airbag in milliseconds. Why other options are incorrect: - Sodium bicarbonate (a) is baking soda, which releases CO2 when heated or reacted with acid, but not at the speed or volume required for an airbag. - Sodium nitrate (c) is an oxidizer used in fertilizers and explosives, but it does not decompose into a gas in the manner required for airbag inflation. - Sodium peroxide (d) is a strong oxidizing agent used in oxygen generators, but it is not the standard propellant for automotive airbags.

The quote 'Good government was never a good substitute for self-government' is attributed to Swami Vivekananda. He emphasized that the dignity and growth of a nation depend on its ability to govern itself (Swaraj), arguing that even a benevolent or 'good' foreign administration cannot replace the inherent necessity and psychological empowerment of self-rule. Analysis of other options: - Ramakrishna Paramahansa: He was a mystic and the spiritual guru of Vivekananda; his teachings focused on the unity of all religions and spiritual realization rather than political governance. - Swami Dayananda: The founder of Arya Samaj, he advocated for the return to the Vedas and social reform, though he supported the idea of indigenous rule, this specific phrasing is not his. - Aurobindo Ghose: While a revolutionary and later a philosopher who wrote extensively on nationalism and spiritual evolution, this specific quote is historically linked to Vivekananda's views on national character and self-reliance.

Step-by-step reasoning: 1. **Analysis of Red Blood Cells (Erythrocytes):** In mammals, mature red blood cells undergo a process called enucleation, where they expel their nucleus. This adaptation provides more internal space for hemoglobin, the protein responsible for transporting oxygen, and allows the cell to assume a biconcave shape, which increases the surface area for gas exchange and improves flexibility to squeeze through narrow capillaries. 2. **Evaluation of other options:** - **Muscle cells:** These are nucleated. Skeletal muscle cells are multinucleated (syncytia) to manage the protein synthesis required for large cells. - **Phagocytic cells:** These are a type of white blood cell (e.g., macrophages, neutrophils). All white blood cells possess a nucleus to regulate their complex immune functions. - **Ciliated cells:** These are specialized epithelial cells (found in the respiratory tract or fallopian tubes) that contain a nucleus to control the production and maintenance of cilia. Therefore, red blood cells are the only cells among the options that lack a nucleus upon maturity.

To determine which Indian state has the longest coastline, we look at the geographical data provided by the Ministry of Environment, Forest and Climate Change and the Census of India. 1. **Gujarat**: Gujarat has the longest coastline of any Indian state. This is due to its highly indented coastline and the presence of the Gulf of Kutch and the Gulf of Khambhat, which significantly increase its total length (approximately 1,600 km). 2. **Andhra Pradesh**: It has the second-longest coastline among the states (approximately 974 km). 3. **Tamil Nadu**: It has a significant coastline on the eastern side, but it is shorter than those of Gujarat and Andhra Pradesh. 4. **Maharashtra**: While it has a long western coastline, it is substantially shorter than that of Gujarat. Therefore, Gujarat is the correct answer.

Under Section 2(13) of the Juvenile Justice (Care and Protection of Children) Act, 2015, a 'juvenile' or a 'child' is defined as a person who has not completed eighteen years of age. This definition is consistent with the United Nations Convention on the Rights of the Child (UNCRC) and other Indian laws such as the POCSO Act. - Option (a) 21 years is incorrect as it exceeds the legal definition of childhood/juvenility. - Option (b) 20 years is incorrect as it is not the statutory threshold for this Act. - Option (d) 16 years is incorrect; while certain provisions of the 2015 Act allow for children between 16 and 18 to be tried as adults in cases of heinous offenses (after a preliminary assessment), the general definition of a 'juvenile' remains anyone under 18.

Step-by-step reasoning: 1. **Definition of Ecotone**: In ecology, an ecotone is a transition area between two biological communities, where two different ecosystems meet and integrate. For example, a marshland is an ecotone between a terrestrial ecosystem and an aquatic ecosystem. 2. **Evaluating Option (a)**: This matches the definition perfectly. A transition zone between two biomes (or ecosystems) is the precise definition of an ecotone. These zones often exhibit higher biodiversity than either of the surrounding communities, a phenomenon known as the 'edge effect'. 3. **Evaluating Option (b)**: A community plus its physical environment is the definition of an **Ecosystem**, not an ecotone. 4. **Evaluating Option (c)**: An association between a species and a group of sites generally refers to a **distribution pattern** or a specific **habitat association**. 5. **Evaluating Option (d)**: A distinct geographic variety within a species is known as a **Subspecies** or a **Race**. Therefore, option (a) is the only scientifically accurate answer.

For the Paris 2024 Olympic Games, the Indian Olympic Association (IOA) appointed veteran table tennis player Sharath Kamal as the flagbearer for the Opening Ceremony. He was chosen for his immense contribution to the sport and his seniority in the Indian sporting community. Analysis of other options: - G Sathiyan: A fellow table tennis player and teammate of Sharath Kamal, but not the designated flagbearer. - Nayana James: An athlete, but not selected as the flagbearer for the opening ceremony. - Sunil Chhetri: A legendary football player, but football is not a sport in which India qualified for the Paris 2024 Olympics, nor was he appointed as the flagbearer.

The SHRESHTA scheme (Scheduled Castes Higher Education After Secondary School) was launched by the Ministry of Social Justice and Empowerment, Government of India. 1. Objective: The primary goal of the scheme is to provide quality education and coaching to SC students in prestigious institutions (like Navodaya Vidyalayas) to ensure they can compete in competitive exams and pursue higher education. 2. Target Group: It specifically targets students from the Scheduled Castes category who have completed class 10 and are pursuing higher secondary education. 3. Why other options are incorrect: - Ministry of MSME focuses on Micro, Small, and Medium Enterprises. - Ministry of Power focuses on electricity and energy infrastructure. - Ministry of Labour and Employment focuses on workforce regulations, employment generation, and labor welfare, not specifically on the educational upliftment of SC students through specialized coaching schemes.

The question describes a specific epidemiological pattern where a disease is consistently present in a population or geographic area. 1. **Endemic (Correct):** An endemic disease is one that is permanently present at a baseline or stable level within a particular geographic area or population group. It does not require external input to maintain its presence (e.g., Malaria in certain tropical regions). 2. **Pandemic (Incorrect):** A pandemic is an epidemic that has spread over several countries or continents, usually affecting a large number of people globally (e.g., COVID-19). 3. **Epidemic (Incorrect):** An epidemic occurs when there is a sudden increase in the number of cases of a disease above what is normally expected in that population in that area. 4. **Outbreak (Incorrect):** An outbreak is similar to an epidemic but is typically more localized (e.g., a specific town or a single institution) and often refers to a sudden rise in cases of a specific disease.

The 2024 French Open (Roland Garros) Men's Singles final took place on June 9, 2024. Carlos Alcaraz won the title by defeating Alexander Zverev in straight sets (6–3, 6–2, 6–7(5), 6–2). This victory marked Alcaraz's second French Open title and his fourth Grand Slam title overall. Analysis of other options: - b. Rublev: Andrey Rublev was eliminated in the quarterfinals. - c. Zverev: Alexander Zverev reached the final but was the runner-up. - d. Sinner: Jannik Sinner was the top seed and won the Australian Open 2024, but was eliminated in the semifinals of the French Open by Alcaraz.

In the context of government budgeting and public finance (specifically within the parliamentary system), a 'Demand for Grants' is a request made by a ministry or department for a specific sum of money to be appropriated from the Consolidated Fund for a particular financial year. 1. **The Process**: The government submits 'Demands' (requests for funds). These are then discussed and voted upon by the legislature (e.g., the Lok Sabha in India). 2. **The Transition**: A 'Demand' remains a request until it is officially approved or 'voted' for by the legislative body. 3. **The Result**: Once the legislature approves the request, the 'Demand' is officially 'granted.' Therefore, the demand becomes a grant only after the process of granting (approval/voting) has occurred. - Option (a) is incorrect because submission is just the start of the process. - Option (b) is incorrect because discussion does not imply approval; a demand can be discussed and then rejected or modified. - Option (d) is incorrect because the closing of the session is a procedural timeline, not the legal trigger for the conversion of a demand into a grant.