Why in the News?
The Overseas Citizenship of India (OCI) status of a notable British-Indian academic has been cancelled due to involvement in anti-India activities.
About Overseas Citizenship of India (OCI):
- Launch: Introduced in August 2005 to give Persons of Indian Origin (PIOs) a long-term connection to India.
- Eligibility: Open to those who were citizens of India on/after January 26, 1950, or eligible for Indian citizenship on that date.
- Nature: OCI is not full citizenship but offers lifelong visa and residency benefits.
- Benefits: Includes a multiple-entry, lifelong visa and exemption from police registration.
- Administered by: Ministry of Home Affairs (MHA).
- Global Numbers (2023): Over 45 lakh OCI holders from 129 countries — top sources include the USA (16.8 lakh), UK (9.34 lakh), Australia (4.94 lakh), and Canada (4.18 lakh).
Who are the Persons of Indian Origin (PIOs)?
- The PIO category was abolished in 2015 and merged with the OCI category. However, existing PIO cards are valid till December 31, 2023.
- PIO referred to a:
- Foreign citizen (except a national of Pakistan, Afghanistan Bangladesh, China, Iran, Bhutan, Sri Lanka and Nepal) who at any time held an Indian passport, or
- Who or either of their parents/ grandparents/great grandparents was born and permanently resided in India as defined in Government of India Act, 1935, or
- Who is a spouse of a citizen of India or a PIO.
|
Rules, Amendments & Privileges:
- 2021 Rule Change: Special permission required for visiting restricted areas, conducting research, journalism, or religious work.
- FEMA Status: Treated as foreign nationals under the Foreign Exchange Management Act (2003).
- Earlier Privileges:
- 2005: Life-long visa, no FRRO (Foreigners Registration Office) registration
- 2007: Parity with NRIs for adoption, domestic airfare
- 2009: Parity for monument entry and access to regulated professions
Limitations and Ineligibility:
- Not Eligible:
- Individuals with parents/grandparents from Pakistan or Bangladesh
- Foreign military personnel, active or retired
- Spouse Clause: Foreign spouse eligible if legally married for at least two years.
- No Political Rights: OCI holders cannot vote, contest elections, hold constitutional posts (President, Vice President, or Supreme Court/High Court Judge), or work in Indian government services.
| [UPSC 2021] Consider the following statements:
1.There is only one citizenship and one domicile.
2.A citizen by birth only can become the Head of State.
3.A foreigner, once granted citizenship, cannot be deprived of it under any circumstances.
Which of the statements given above is/are correct?
Options: (a) 1 only * (b) 2 only (c) 1 and 3 (d) 2 and 3 |
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Why in the News?
As of February 2025, the Indian Coast Guard (ICG) protected a record 6.98 lakh Olive Ridley turtles during their mass nesting at the Rushikulya river mouth in Odisha.
About Operation Olivia:
- Launch: Operation Olivia is an annual conservation mission by the Indian Coast Guard, started in the early 1980s.
- Main Objective: It aims to protect Olive Ridley turtles during their nesting season, from November to May.
- Primary Locations: The operation focuses on Odisha’s coast, especially Gahirmatha Beach, Devi River mouth, and Rushikulya River mouth.
- Turtle Nesting Scale: Over 8 lakh turtles arrive annually at these sites to nest.
- Surveillance Efforts: The Coast Guard has conducted more than 5,387 surface patrols and 1,768 aerial missions.
- Community Engagement: Fishermen are encouraged to use Turtle Excluder Devices (TEDs) that allow turtles to escape fishing nets.
About Olive Ridley Turtles:
- Appearance: Named for their olive-green shell, or carapace.
- Diet: They are Omnivores, though feeding mainly on jellyfish, crustaceans, and molluscs.
- Nesting Behaviour: Known for Arribada, a phenomenon where thousands of females come ashore simultaneously to lay eggs.
- Habitat Range: Found in warm waters of the Pacific, Atlantic, and Indian Oceans.
- Major Nesting Sites in India:
- Gahirmatha Marine Sanctuary, Odisha (largest site)
- Devi River mouth (discovered in 1981)
- Rushikulya River mouth (discovered in 1994)
-
- IUCN Red List: Listed as Vulnerable.
- CITES: Included in Appendix I, banning international trade.
- Wildlife Protection Act, 1972: Listed under Schedule I, offering the highest legal protection in India.
| [UPSC 2002] The sea coast of which one of the following states has become famous as a nesting place for the giant Olive Ridley turtles from South America?
Options: (a) Goa (b) Gujarat (c) Odisha* (d) Tamil Nadu |
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Why in the News?
Scientists now believe the Moon’s near side looks different from its far side due to its internal structure and volcanic past, revealed by NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission.
About the GRAIL Mission:
- Launch: NASA launched the GRAIL mission in 2011 to study the moon’s internal structure.
- Spacecraft Used: It used two spacecraft, Ebb and Flow, flying in tandem to detect gravity variations.
- Objectives: The mission measured tiny changes in distance between the two spacecraft caused by differences in the moon’s gravitational field.
- Scientific Outcome: The data revealed important details about the moon’s crust thickness, interior composition, and subsurface features.
Key Findings: Reasons for the Moon’s Asymmetry
- Tidal Deformation: The nearside bends more than the farside due to Earth’s gravity, a process called tidal deformation.
- Internal Activity: The nearside is geologically warmer and more active, suggesting internal structural differences.
- Volcanic History: Ancient volcanic activity on the nearside formed large basaltic plains, while the farside remained rugged and less active.
- Heat Distribution: Elements like thorium and titanium accumulated on the nearside, making it 100–200°C hotter than the farside.
- Crust Thickness: The nearside has a thinner crust, allowing magma to escape, while the farside’s thicker crust trapped heat and blocked eruptions.
- Thermal Contrast: The thinner crust also allowed more heat-producing elements to concentrate, increasing the temperature gap between the two sides.
Why do these findings matter?
- Support for Lunar Missions: Insights from GRAIL help design better navigation and timing systems for future lunar operations.
- Applications: GRAIL’s method can be applied to other moons like Enceladus and Ganymede, which may hold potential for life.
| [UPSC 2007] NASA’S Deep Impact space mission was employed to take detailed pictures of which comet nucleus?
Options: (a) Halley’s Comet (b) Hale-Bopp (c) Hyakutake (d) Tempel 1 * |
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Why in the News?
A protest has erupted in Goa after a scientific paper on water availability and diversion in the Mahadayi basin reignited its long-standing dispute with Karnataka.
About the Mahadayi River:
- Origin: The Mahadayi River (Mhadei in Goa) originates in Bhimgad, Karnataka, in the Western Ghats.
- Length and Flow: It flows 81 km, passing through Karnataka (35 km), Goa (45 km), and Maharashtra (1 km) before reaching the Arabian Sea.
- Basin Area: Covers 2,032 sq km—78% in Goa, 18% in Karnataka, and 4% in Maharashtra.
- Significance: Forms the Mandovi River, essential for drinking water, agriculture, and navigation in Goa.
- Tributaries: Kalasa Nala, Surla Nala, Haltar Nala, Poti Nala, Mahadayi Nala, Pansheer Nala, Bail Nala, Andher Nala and many more. It has a catchment area of 2032 sq.km.
- Topography: Elevation ranges between < 0m and > 980m w.r.t Mean Sea Level, slope of the catchment varies up to 150%. Very high slope we observed in the Ghats (Braganja Ghats).
- Waterfalls: Variations in the terrain has led to formation of various water falls such as the Doodhsagar falls,Vajra poha falls etc.
- Ecology: Supports rich biodiversity, including the Salim Ali Bird Sanctuary.
- Mineral Ores found: Iron, limestone, bauxite, quartz, limestone, sand, clay, lime shell, Manganese, Asbestos, Mica, Lead, Cadmium.
Mahadayi Water Dispute:
- Karnataka’s Project: Proposed the Kalasa-Banduri Nala to divert water to the Malaprabha basin.
- Tribunal Setup: The Mahadayi Water Disputes Tribunal (2010) addressed disagreements.
- 2018 Verdict:
- Karnataka: 13.42 tmcft (1.72 from Kalasa, 2.18 from Bhandura).
- Goa: 24 tmcft (plus 9.395 tmcft for existing use).
- Maharashtra: 1.33 tmcft.
- Concerns: Goa feared impacts on Mandovi navigation; the tribunal cited tidal flow ensures stability.
- Legal Status: Both states have challenged the verdict in the Supreme Court.
Controversy Over CSIR-NIO Report:
- Study Findings: Claimed Karnataka’s diversions would have minimal impact on Goa’s water or estuarine navigation.
- Institutions: Report authored by CSIR-NIO (Goa) and INCOIS (Hyderabad).
- Recommendations: Suggested check dams and a Tillari-style agreement for shared water use and ecological balance.
Tap to read more about Interstate Water Disputes in India.
| [UPSC 2013] Constitutional mechanisms to resolve the inter-state water disputes have failed to address and solve the problems. Is the failure due to structural or process inadequacy or both? Discuss. |
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Why in the News?
Chinese researchers found that A-to-I mRNA editing, once considered random, plays a key role in development, especially in the wheat pathogen Fusarium graminearum.
About A-to-I mRNA Editing:
- mRNA: Our cells use DNA as a guide to make proteins. First, they copy DNA into messenger RNA (mRNA).
- A-to-I editing: This is a process where the letter adenosine (A) in mRNA is changed to inosine (I) by special enzymes called ADARs. The cell reads inosine as guanine (G), which can change the protein being made.
- Why it matters:
- It helps the cell make different versions of proteins without changing the DNA.
- It can remove early stop signals, allowing full proteins to be made.
- It helps the cell adapt to different conditions or stages of life.
What did scientists discover in the fungus?
- Fungal Discovery: Scientists found that the fungus edits over 26,000 mRNA sites during reproduction, not during normal growth.
- Development Role: This editing fixes early stop signals in key genes, helping the fungus develop and reproduce properly.
- Stress Adaptation: Some genes work better unedited under stress, showing the fungus edits only when needed for survival.
Does this happen in humans?
Yes, A-to-I editing is common in humans:
- In the brain: It helps with brain growth, memory, and learning.
- In the immune system: It helps fight infections and control inflammation.
Health Implications:
- Health Risks: Faulty editing is linked to epilepsy and certain cancers.
- Therapeutic Potential: Understanding this process can lead to new treatments and improve gene-editing technologies.
| [UPSC 2016] In the context of the developments in Bioinformatics, the term ‘transcriptome’, sometimes seen in the news, refers to:
Options: (a) a range of enzymes used in genome editing (b) the full range of mRNA molecules expressed by an organism * (c) the description of the mechanism of gene expression (d) a mechanism of genetic mutations taking place in cells |
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Why in the News?
The RBI may transfer a record ₹2.5–₹3 lakh crore surplus for 2024–25 after its recent review of its Economic Capital Framework (ECF).
About Surplus Transfer by RBI:
- Legal Basis: Under Section 47 of the RBI Act, 1934, the RBI must transfer its net surplus to the central government.
- Tax Exemption: As per Section 48, the RBI is exempt from income tax and direct taxes.
- Timeline: RBI has recently changed its accounting year from June-July to April-May.
- Recent Transfers: In 2023–24, RBI transferred a record ₹2.11 lakh crore; estimates for 2024–25 range between ₹2.5 and 3 lakh crore.
- Reserve Allocation: Some surplus may be set aside for contingency or asset development funds.
- Policy Debate: The government often seeks higher transfers, while the RBI stresses on maintaining financial stability and autonomy.
- Past Disagreements: Tensions have occurred but are usually resolved through mutual agreement.
How does the RBI generate its surplus?
- Foreign Investments: RBI earns returns from investing in foreign government bonds, treasury bills, and deposits with other central banks.
- Domestic Bonds: It receives interest on Indian government securities (G-secs) held in its portfolio.
- Bank Lending: Income is earned by lending short-term funds to commercial banks via repo operations.
- Commission Services: The RBI charges commissions for managing borrowings and public debt for the central and state governments.
- Main Expenditure: Costs include printing currency, staff salaries and pensions, bank commissions, and dealer fees.
- Net Surplus: The surplus is what remains after expenses, provisions, and reserves are accounted for.
Back2Basics: Economic Capital Framework (ECF)
- Purpose: The ECF guides how much capital RBI must retain and how much surplus can be transferred.
- Y.H. Malegam Committee (2013): It reviewed the adequacy of reserves and surplus distribution policy in 2013, recommended a higher transfer to the government.
- Introduction: Finalised in 2019, based on a committee led by Bimal Jalan.
- Goal: Seeks to balance government funding needs with RBI’s financial resilience.
- Reserve Components: Defines key buffers like the Contingency Risk Buffer (CRB), Revaluation Reserves, and Asset Development Fund.
- Minimum CRB: Requires at least 5.5% of RBI’s balance sheet to be held as contingency reserve.
- Transfer Stability: Allows for more consistent surplus transfers when RBI’s earnings are strong.
|
| [UPSC 2021] In India, the central bank’s function as the ‘lender of last resort’ usually refers to which of the following:
1.Lending to trade and industry bodies when they fail to borrow from other sources.
2.Providing liquidity to the banks having a temporary crisis.
3.Lending to governments to finance budgetary deficits.
Select the correct answer using the code given below:
Options: (a) 1 and 2 (b) 2 only * (c) 2 and 3 (d) 3 only |
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Why in the News?
The onset of cool, moisture-laden monsoon winds offers not just relief but also a significant opportunity for wind energy generation.
About the Indian Monsoon:
- Origin: The word “monsoon” comes from Arabic ‘mausin’ or Malayan ‘monsin,’ meaning “season”.
- Seasonal Wind Shift: Monsoons are seasonal winds that reverse direction with changing seasons.
- Types:
-
- Southwest Monsoon: Blows from sea to land, bringing rainfall across most of India.
- Northeast Monsoon: Blows from land to sea, bringing rain mainly to southeast India.
- Role of Tibet: The Tibetan Plateau heats up in summer, creating low pressure that draws in moist winds.
- Ocean Influence: A high-pressure system in the southern Indian Ocean helps drive the southwest monsoon.
- Atmospheric Factors: Influencers include the Subtropical Jet Stream, Tropical Easterly Jet, and ITCZ.
- Other Drivers: The Somali Jet, Somali Current, Indian Ocean Dipole, and Walker Cell also affect monsoon behaviour.
How does monsoon impact wind variability?
- Changing Wind Speeds: Monsoon wind speeds vary in strength and direction over time and place.
- Energy Planning: Wind behaviour prediction is crucial for renewable power management, especially wind energy.
- Agricultural Demand: Kharif crops planted in June depend on monsoon, raising seasonal energy demand.
- Wind Energy Output: In areas like the Western Ghats, 70% of wind energy is generated June–September.
- Forecasting Tools: Numerical Weather Prediction (NWP) models provide high-resolution wind forecasts.
- AI Models: Tools like Google’s MetNet3 use satellite and radar data to predict wind in remote areas.
India’s Wind Energy: Capacity, Growth & Challenges
- India became the 3rd largest wind and solar producer in 2024, after China and the US.
- Installed wind capacity: 50 GW as of March 31, 2025.
- In 2024, wind and solar contributed 10% of electricity—solar 7%, wind 3%; hydro added 8%, totalling 22% from clean sources.
- Solar capacity grew by 24 GW in 2024, doubling 2023’s figure; wind grew by 3.4 GW.
- Leading wind additions: Gujarat (1,250 MW), Karnataka (1,135 MW), Tamil Nadu (980 MW).
- Top wind states: Tamil Nadu, Gujarat, and Maharashtra; targets: 140 GW wind and 500 GW non-fossil capacity by 2030.
- Land Use & Capacity Utilization Factor (CUF): Wind farms occupy just 2% of land, allowing agriculture on the rest; CUF ranges between 16%–19%, with peak generation during monsoon months.
|
| [UPSC 2014] The seasonal reversal of winds is the typical characteristic of:
Options: (a) Equatorial climate (b) Mediterranean climate (c) Monsoon climate * (d) All of the above climates |
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Why in the News?
Permanent Lok Adalats in as many as 16 districts of Rajasthan have ceased functioning owing to the non-extension of tenure of their presiding officers and members.
About Permanent Lok Adalats (PLAs)
- Legal Basis: PLAs are statutory bodies established under Section 22-B of the Legal Services Authorities Act, 1987.
- Establishment: They were introduced in 2002 to offer speedy and affordable dispute resolution for public utility services.
- Disputes Handled: PLAs resolve issues related to transport (air, road, water), postal, telecom, electricity, water supply, sanitation, healthcare, and insurance.
- Composition: Each PLA has a Chairman (a current or retired District Judge or higher) and 2 members with experience in the relevant public utility sectors.
- Functioning: Unlike regular Lok Adalats, PLAs operate on a continuous basis and are always available for dispute resolution.
- Jurisdiction Limit: They can hear cases involving claims up to ₹1 crore but cannot take up non-compoundable criminal cases.
- Unique Power: If conciliation fails, the PLA has the authority to adjudicate the dispute and issue a final and BINDING award, just like a civil court.
Back2Basics: Lok Adalats vs Permanent Lok Adalats
|
Lok Adalats |
Permanent Lok Adalats |
| Nature |
Ad hoc, held occasionally |
Permanent, functional continuously |
| Jurisdiction |
Broad (civil, compoundable criminal, family, etc.) |
Limited to public utility service disputes |
| Dispute Stage |
Usually post-litigation |
Pre-litigation stage only |
| Panel Composition |
Judicial officers, lawyers, social workers |
Chairman (Judge) + 2 experts in utility services |
| Conciliation Role |
Only conciliatory; no decision if no settlement |
Can adjudicate if no settlement is reached |
| Decision |
Binding only if parties agree |
Award is final and binding, with no appeal |
| Legal Status |
Decree of a civil court |
Also a civil court decree, but with adjudication power |
| Appeal Provision |
No appeal, but fresh suit possible |
No appeal, but constitutional remedies may apply |
| [UPSC 2009] With reference to Lok Adalats, consider the following statements:
1. An award made by a Lok Adalat is deemed to be a degree of a civil court and no appeal lies against thereto before any court.
2. Matrimonial/Family disputes are not covered under Lok Adalat.
Which of the statements given above is/are correct?
Options: (a) 1 only * (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 |
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Why in the News?
The Archaeological Survey of India (ASI), in private collaboration, has successfully completed the restoration of Rajon ki Baoli, a 16th-century Lodi-era stepwell located in New Delhi.
About Rajon ki Baoli:
- Location: Situated in Mehrauli Archaeological Park, Delhi, around 400 meters south of Adham Khan’s Tomb.
- Build year: Built in 1506 CE by Daulat Khan Lodi, an official under Sikandar Lodi.
- Name Meaning: “Rajon ki Baoli” means “Stepwell of the Masons”, referring to raj mistris, not royalty.
- Structure: The stepwell is rectangular, covering 1,610 sq m, and is 13.4 meters deep.
- Design: It is a 4-level structure, with only the topmost tier visible from ground level.
- Architectural Features:
- Includes verandas, arched corridors, 12-pillared arcades, and stucco medallions.
- The complex also has a mosque, a tomb, and a chhatri (pavilion).
- Purpose: Served as a water source and resting place and had social-religious utility.
About the Lodi Dynasty:
- The Lodi Dynasty ruled the Delhi Sultanate from 1451 to 1526.
- Founder: Established by Bahlul Lodi, the first Afghan ruler of Delhi.
- Territorial Control: Dominated Punjab, Jaunpur, Gwalior, and the Upper Ganga Valley.
- Key Rulers:
-
- Bahlul Lodi (1451–1489): Annexed Jaunpur and solidified Afghan influence in northern India.
- Sikandar Lodi (1489–1517): Founded Agra, introduced agricultural reforms, standardised land with Gaz-i-Sikandari, and patronised literature and music. He imposed jizya and demolished temples in Mathura, reflecting intolerance.
- Ibrahim Lodi (1517–1526): Lost the First Battle of Panipat to Babur, ending the dynasty and the Sultanate.
- Successor: Their fall marked the shift from the Delhi Sultanate to the Mughal Empire in Indian history.
Tap to read more about Traditional Water Harvesting Systems in India.
| [UPSC 2006] Which one of the following is the correct chronological order of the Afghan rulers to the throne of Delhi?
(a) Sikandar Shah – Ibrahim Lodi – Bahlol Khan Lodi
(b) Sikandar Shah – Bahlol Khan Lodi – Ibrahim Lodi
(c) Bahlol Khan Lodi – Sikandar Shah – Ibrahim Lodi*
(d) Bahlol Khan Lodi – Ibrahim Lodi – Sikandar Shah |
ASI completes conservation work in Lodhi-era stepwell – The Hindu
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Why in the News?
The Department of Posts has released a commemorative postage stamp to mark 125 years of the Kodaikanal Solar Observatory (KoSO)—one of India’s oldest and most significant astronomical research centres dedicated to studying the Sun.
About the Kodaikanal Solar Observatory (KoSO):
- Founding: Established in the late 19th century, KoSO was established in 1899 after atmospheric surveys by Charles Michie Smith.
- Location: It is located in Kodaikanal, Tamil Nadu, in the Palani Hills, chosen for its excellent sky conditions.
- Early Observations: Initially focused on observing sunspots, solar prominences, and solar radiation.
- Modern Equipment: Now equipped with the H-alpha telescope (for flares and prominences) and WARM (for high-resolution sunspot imaging).
- Institutional Role: Became part of the Indian Institute of Astrophysics (IIA) in April 1971.
- Scientific Importance: KoSO contributes to understanding the Sun’s effect on Earth’s climate and space weather.
Important Observations / Discoveries:
- Evershed Effect (1909): Discovered by John Evershed, it was the first observation of radial gas outflows in sunspots, a key finding in solar physics.
- Historic Solar Archive (1904–2017): Created one of the world’s longest continuous solar datasets.
- Digitization: First Indian observatory to digitise solar data (since 1984); currently maintains a digital archive of 1.48 lakh images (~10 TB).
- Wider Scientific Work: Extended research into cosmic rays, radio astronomy, ionospheric physics, and stellar astrophysics over the decades.
| [UPSC 2016] Discuss India’s achievements in the field of Space Science and Technology. How the application of this technology has helped India in its socio-economic development? |
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Why in the News?
May 16 is observed annually as Sikkim Day, marking the historic occasion in 1975 when the Kingdom of Sikkim formally became a state of India.
About the Kingdom of Sikkim
- Foundation: The Kingdom of Sikkim was established in 1642, when three Tibetan lamas crowned Phuntsong Namgyal as the first Chogyal (monarch).
- Namgyal dynasty: It ruled Sikkim for 333 years, maintaining a Buddhist monarchy until 1975.
- Treaty of Tumlong (1861): It made Sikkim a British protectorate, where the Chogyals retained internal authority while the British handled external affairs.
- Other key treaties shaping Sikkim’s status: These included the Treaty of Titaliya (1817), Calcutta Convention (1890), and Lhasa Convention (1904), which defined borders and reaffirmed British influence.
How did Sikkim join India?
- Post-1947 Status: After India’s independence, Sikkim did not join India like other princely states, due to its unique British treaty status.
- Nehru’s Approach: While Sardar Patel and B.N. Rau wanted Sikkim to accede, Jawaharlal Nehru opted for a Standstill Agreement to preserve the status quo.
- Indo-Sikkim Treaty of 1950: This treaty made Sikkim an Indian protectorate, with India managing defence, foreign affairs, and communications.
- Role of Sikkim National Congress: Led by Kazi Dorji, the SNC became the key pro-democracy and pro-merger party.
- 1973 Agreement: After widespread protests, a tripartite agreement was signed between the Chogyal, the Government of India, and the Sikkimese parties.
- Democratic Transition: In 1974, elections were held, and a new constitution reduced the monarch’s powers.
- Referendum of 1975: In April 1975, over 97% of voters supported abolishing the monarchy and merging with India.
- Merger with India: In May 1975, the 36th Constitutional Amendment was passed, and Sikkim became the 22nd state of India. It added Article 371F to provide special provisions for the state of Sikkim.
Back2Basics: Article 371F of the Indian Constitution
- Constitutional Origin: Added by the 36th Amendment Act (1975) when Sikkim became the 22nd state of India.
- Objective: Protects Sikkim’s unique history, culture, and legal system during integration.
- Legislative Assembly: Sikkim must have at least 30 MLAs, fewer than other states under Article 170.
- Parliamentary Representation: Sikkim has 1 Lok Sabha and 1 Rajya Sabha seat, with the Assembly electing the MP.
- Governor’s Role: Governor holds special responsibility for peace, equity, and development.
- Pre-Merger Laws: Existing laws and judgments before 1975 remain valid unless changed by Parliament.
- Presidential Powers: President can modify laws and extend central laws to Sikkim within two years post-merger.
- Land and Job Rights: Only 1961-registered Sikkimese can own land or hold state government jobs.
- Tax Exemption: Original Sikkimese were exempt from income tax.
- Recent Controversy: The Finance Bill, 2023 expanded the term “Sikkimese”, raising concerns over erosion of indigenous rights.
|
| [UPSC 2007] Which one of the following is the correct chronological order of the formation as full States of the Indian Union?
Options:
(a) Sikkim-Arunachal Pradesh-Nagaland-Haryana
(b) Nagaland-Haryana-Sikkim-Arunachal Pradesh *
(c) Sikkim-Haryana-Nagaland-Arunachal Pradesh
(d) Nagaland-Arunachal Pradesh-Sikkim-Haryana |
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Why in the News?
The Tamil Nadu CM has criticised the Presidential Reference under Article 143 as a “desperate attempt” to weaken State powers, following a Supreme Court ruling that set timelines for Governors and the President to act on State Bills.
Recent Invocation:
- The Presidential Reference asked whether the Supreme Court could impose timelines on:
- Governors under Article 200 (assent to State Bills)
- The President under Article 201 (Bills reserved for Presidential assent)
|
What is Article 143 of the Indian Constitution?
- Article 143 empowers the President of India to seek the advisory opinion of the Supreme Court on any question of law or fact that is-
- of public importance
- Likely to arise or has already arisen
- This provision defines the Supreme Court’s advisory jurisdiction, exclusive to the President.
- Sub-clauses and Legal Operation:
- Article 143(1): The President may refer any matter to the Supreme Court for its opinion. In the first case, the Supreme Court may tender or may refuse to tender its opinion to the president.
- Article 143(2): Allows the President to refer disputes arising from pre-Constitution agreements, including state-related matters, for the Supreme Court’s opinion. The Supreme Court must tender its opinion to the President.
- Nature of the Reference: The Supreme Court’s opinion is advisory and NOT legally binding since it is NOT a judicial pronouncement.
- President’s Response: It is NOT binding on the President; he/she may follow or may not follow the opinion. However, it facilitates the government to have an authoritative legal opinion.
- Types of Questions Referred: Article 143(1) allows the President to refer questions of law or fact.
- Legal questions: Constitutional interpretation, rights, and executive powers.
- Factual questions: The 1993 Ram Janmabhoomi-Babri Masjid reference asked whether a temple existed at the disputed site.
- Judicial Interpretation: The Supreme Court has clarified that Article 143 is broad in scope and not limited to questions that have arisen; potential or likely questions can also be referred.
Executive’s Control of Presidential Reference:
- Although Article 143 vests the power in the President, the real decision to refer is taken by the Union Council of Ministers under Article 74(1).
- Article 74(2) bars the Court from inquiring whether such advice was given.
|
| [UPSC 2010] Consider the following statements:
The Supreme Court of India tenders’ advice to the President of India on matters of law or fact
1. on its own initiative (on any matter of larger public interest).
2. if he seeks such an advice.
3. only if the matters relate to the Fundamental Rights of the citizens.
Which of the statements given above is/are correct?
Options: (a) 1 only (b) 2 only * (c) 3 only (d) 1 and 2 only |
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Why in the News?
A team of researchers from top Chinese scientific institutions has reported a major breakthrough in the creation of atomically thin 2D metal sheets using a novel high-pressure sandwich method.
About the 2D Metal Created:
- Definition: 2D metals are only one or two atoms thick, so electrons can move in just two dimensions.
- Quantum Confinement: Electrons in 2D metals are restricted to specific energy levels, similar to how they behave in atoms.
- Scientific Interest: Metals like bismuth, tin, and lead in 2D form are being studied for their electrical, magnetic, and quantum properties.
- Applications: Their special properties make them useful for quantum computing, sensors, and advanced electronics.
Technologies Involved:
- Quantum Dots: These are tiny semiconductors where electrons are tightly confined, creating quantised energy states.
- Quantum Confinement: In quantum dots, electrons can’t move freely in any direction, leading to discrete energy levels.
- Link to 2D Metals: In 2D metals, electrons are confined in two dimensions, changing conductivity, magnetism, and optical behaviour.
- Process: Chinese scientists created 2D metals by sandwiching metal powder between two MoS₂-coated sapphire layers.
- Steps involved: The structure is heated, twisted, and pressed to form ultra-thin sheets, then cooled and peeled off.
- Material Choice: MoS₂ and sapphire were chosen for their strength, smoothness, and low chemical reaction with metal.
Note:
Quantum confinement occurs when a particle like an electron is trapped in an extremely small space, such as a nanoscale material. This restriction changes its energy levels, making them discrete instead of continuous. As a result, the material’s properties—like color and conductivity—can change with size. |
| [UPSC 2012] Graphene is frequently in the news recently. What is its importance?
1. It is a two-dimensional material and has good electrical conductivity.
2. It is one of the thinnest but strongest materials tested so far.
3. It is entirely made of silicon and has high optical transparency.
4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.
Options: (a) 1 and 2 only (b) 3 and 4 only (c) 1, 2 and 4 only* (d) 1, 2, 3 and 4 |
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Why in the News?
India and Japan have begun the preliminary design phase of the Chandrayaan-5 mission, also known as LUPEX (Lunar Polar Exploration).
Back2Basics: Legacy of Chandrayaan Missions
- Chandrayaan-1 (2008): First mission, focused on mineral and chemical mapping.
- Chandrayaan-2 (2019): Orbiter mission with 98% success.
- Chandrayaan-3 (2023): Achieved a historic soft landing on the Moon’s south pole.
- Chandrayaan-4 (Upcoming, 2027):
- It is a planned lunar sample return mission by ISRO, expected to launch around 2027, with the landing site near Statio Shiv Shakti at the lunar south pole.
- The mission involves five modules launched on two LVM-3 rockets, later docked in Earth orbit to form an integrated spacecraft.
- A robotic arm and drill will collect 2–3 kg of surface and sub-surface lunar samples for return to Earth.
- The Re-entry Module (RM) will re-enter Earth’s atmosphere with the samples using ballistic re-entry, marking India’s first attempt at sample return.
- Chandrayaan-5 / LUPEX: Aimed at deeper exploration with global participation.
- Manned Lunar Mission: Prospected lunar landing by 2040.
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About Chandrayaan-5/LUPEX Mission:
- It is a collaborative mission between ISRO and JAXA.
- Approval: Cabinet approval for the mission was granted on March 10, 2025.
- Launch: It will carry a 6.5-tonne payload and launch aboard Japan’s H3 rocket in 2027–28.
- Collaboration: The lander is being developed by ISRO and the 350-kg rover by JAXA.
- Duration: The mission is expected to last 100 days, with a possible extension of one year.
- Mission Goals and Objectives:
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- Explore water and regolith in the lunar south pole’s Permanently Shadowed Regions (PSRs).
- Drill into the Moon’s surface, analyse soil samples, and perform in-situ experiments.
- Assess water content, quality, and analyse surface volatiles using advanced instrumentation.
- Exploration of the far side of the Moon.
Scientific Collaboration and Instruments:
- A total of 7 scientific instruments will be onboard the mission.
- ISRO’s Contribution: Development of the lander; creation of one sensor in a major four-sensor instrument.
- JAXA’s Contribution: Development of the rover and three sensors in the same instrument; Rover is designed to climb 25° inclines and operate on a complex battery charging protocol.
- ESA (European Space Agency): Developing a mass spectrometer.
- NASA: Contributing neutron spectrometers.
| [UPSC 2009] In the context of space technology, what is Bhuvan, recently in the news?
Options: (a) A mini satellite launched by ISRO for promoting the distance education in India (b) The name given to the next Moon Impact Probe, for Chandrayaan-II (c) A geoportal of ISRO with 3D imaging capabilities of India* (d) A space telescope developed by India |
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Why in the News?
The Ministry of New and Renewable Energy (MNRE) has lowered the efficiency requirement for off-grid solar panels to make rural electrification easier and more affordable.
About India’s Off-Grid Solar Programme:
- About: The programme was launched by the Ministry of New and Renewable Energy to provide solar energy access in regions without reliable grid electricity.
- Mission Framework: Implemented under the National Solar Mission (2010), it aimed to install 2,000 megawatt-peak (MW-P) of off-grid and decentralised systems by 2022.
- Phased Implementation:
- Phase I (2010–2014) targeted 200 MW-P capacity.
- Phase II (2014–2017) expanded to 500 MW-P with a focus on lighting, pumps, and study lamps.
- Phase III (2018–2021) emphasised solar streetlights, study lamps, and solar plants for public institutions.
- Restructuring: Solar pumps were moved to the Pradhan Mantri Kisan Urja Suraksha evam Utthaan Mahabhiyan scheme (PM-KUSUM), and solar home lights were integrated into the Saubhagya Scheme.
- Key Applications: Included solar home lighting systems, streetlights, lanterns, study lamps, power packs, and water pumps for irrigation and drinking.
India’s Progress in Off-Grid Solar Energy:
- Installed Capacity: As of April 2025, India’s total solar capacity reached 107.95 gigawatts, with 4.98 gigawatts from off-grid systems.
- Capacity Growth: From 2016 to 2024, solar installations grew from 172.45 gigawatts to 216.86 gigawatts.
- Recent Trends: In 2024, adoption rose as solar appliances became more affordable in remote and underserved regions.
- Impact: The programme has been vital for electrification in areas where grid expansion is limited by geography, cost, or infrastructure.
Tap to know more about India’s Solar Capacity and its Global Position.
| [UPSC 2020] With reference to solar water pumps, consider the following statements:
1. Solar power can be used for running surface pumps and not for submersible pumps.
2. Solar power can be used for running centrifugal pumps and not the ones with piston.
Which of the statements given above is/are correct?
Options: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2* |
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Why in the News?
In a recent breakthrough at CERN’s ALICE (A Large Ion Collider Experiment), scientists observed that near-collisions of lead ions in the Large Hadron Collider (LHC) can result in the formation of gold atoms and other novel nuclei.
How was Lead converted into Gold?
- In ultra-peripheral collisions at the Large Hadron Collider, lead atoms passed close without touching, creating strong electromagnetic fields.
- These fields released photons that caused some lead atoms to lose 3 protons and 2 neutrons, transforming them into gold-203.
- Between 2015–2018, 86 billion gold atoms were created—just 29 picograms—scientifically important but not commercially valuable.
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About the Large Hadron Collider (LHC):
- The LHC has been working since September 2008 and is the world’s largest particle accelerator.
- Development: Between 1998 and 2008 in collaboration with over 10,000 scientists, and hundreds of universities and laboratories across more than 100 countries.
- Location: It lies in a 27-kilometre tunnel under the France–Switzerland border, near Geneva, and is operated by CERN.
- Purpose: It smashes protons or lead atoms together to help scientists study the smallest building blocks of the universe.
- Working Mechanism: About 9,600 magnets guide particles in a circle using strong magnetic fields.
- Speed: Particles travel at 99.999999% the speed of light, creating conditions like the Big Bang.
- Particles Studied: The LHC focuses on quarks (which come in six types) and gluons, which hold quarks together using the strong nuclear force.
- Members: 24 countries spans across the Europe. Japan and US are Observer.
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- India signed a cooperation agreement with CERN in 1991 and joined its Large Hadron Collider project in 1996; it became an Associate Member in 2016 after gaining Observer status in 2002.
- India also helped design LHC components such as superconducting magnets, cryogenic systems, and accelerator protection systems.
About the ALICE Experiment:
- ALICE is designed to study heavy-ion collisions, mainly using lead atoms.
- Objective: It recreates matter similar to that formed just after the Big Bang, helping us understand the early universe.
- Detection Range: ALICE can study both large particle blasts and rare, low-energy events with high precision.
- Size and Setup: It weighs 10,000 tons, measures 26 × 16 × 16 metres, and sits 56 metres underground.
- Members: As of 2024, ALICE includes over 1,900 scientists from 174 institutes across 39 countries, including India.
- India’s Contribution: Key instruments like the Photon Multiplicity Detector for ALICE and the Hadron Outer Calorimeter for CMS.
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| [UPSC 2009] In the year 2008, which one of the following conducted a complex scientific experiment in which sub-atomic particles were accelerated to nearly the speed of light?
Options: (a) European Space Agency (b) European Organization for Nuclear Research* (c) International Atomic Energy Agency (d) National Aeronautics and Space administration |
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Why in the News?
Justice B.R. Gavai has been sworn in as the 52nd Chief Justice of India (CJI).
About the Chief Justice of India:
- The CJI is the head of the Supreme Court and the highest-ranking judicial officer in the country.
- As the “Master of the Roster,” the CJI has the exclusive authority to:
- Constitute benches
- Allocate cases among judges
- Decide the schedule of hearings
- The CJI leads the judicial and administrative functions of the Supreme Court.
- Holds administrative control as recognised in State of Rajasthan v. Prakash Chand (1997).
- The CJI is referred to as “first among equals” among Supreme Court judges.
Powers and functions of the CJI:
-
- Assigns judges to the Constitution Benches. (Article 145)
- Handles interpretation of important legal and constitutional matters. (Article 145)
- Exercises judicial leadership by steering jurisprudential direction. (Article 145)
- Exercises judicial authority in matters of national significance. (Article 136)
- Protects fundamental rights through the Supreme Court’s original and appellate jurisdiction. (Article 32)
- Administrative Functions:
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- Maintains court roster and case listing. (Derived from judicial precedent and administrative conventions)
- Supervises court staff and administration. (Based on administrative authority of the CJI)
- Ensures smooth functioning of the Supreme Court. (Supreme Court Rules, 2013)
- Holds disciplinary authority over subordinate judicial officers. (Administrative powers acknowledged in precedents)
- Engages in administration of justice at the highest level. (Overarching responsibility under Article 145)
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- Provides advisory input when consulted by the President. (Article 143)
Appointment and Terms:
- Article 124 of the Constitution empowers the President of India to appoint the CJI.
- Traditionally, the senior-most judge of the Supreme Court is appointed.
- Exceptions to this practice:
- 1973: Justice A.N. Ray appointed over 3 senior judges.
- 1977: Justice M.H. Beg appointed over Justice H.R. Khanna.
- Qualifications as outlined in Article 124(3):
- Must be a citizen of India, and:
- Served at least five years as a High Court judge, or
- Practised at least ten years as a High Court advocate, or
- Deemed a distinguished jurist by the President.
Selection Procedure:
- Governed by the Memorandum of Procedure for Appointment of Supreme Court Judges.
- The Union Law Minister seeks the outgoing CJI’s recommendation.
- The recommendation is processed as follows:
- Sent to the Prime Minister by the Law Ministry.
- Prime Minister advises the President.
- President of India appoints the new CJI.
- No specific timeline is defined — the recommendation must be made at the “appropriate time”.
Tenure and Removal:
- CJI serves until the age of 65 years.
- Can only be removed through removal under Article 124(4):
- Requires approval by both Houses of Parliament.
- Must be supported by:
- A majority of total membership, and
- A two-thirds majority of members present and voting.
- Grounds for removal: Proven misbehavior or incapacity.
[UPSC 2021] With reference to the Indian judiciary, consider the following statements:
- Any retired judge of the Supreme Court of India can be called back to sit and act as a Supreme Court judge by the Chief Justice of India with the prior permission of the President of India.
- A High Court in India has the power to review its own judgment as the Supreme Court does
Which of the statements given above is/are correct?
Options: (a) 1 only (b) 2 only (c) Both 1 and 2 * (d) Neither I nor 2 |
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Why in the News?
In October 2022, 75 Digital Banking Units were launched across remote districts to commemorate India’s 75th Independence Day, but their momentum has declined from past 2 years.
About Digital Banking Units (DBUs):
- DBUs are specialized, fixed-location banking hubs designed to deliver a wide range of digital financial services using modern infrastructure.
- They operate in both self-service and assisted modes, offering customers 24/7 access to banking in a paperless, secure, and cost-effective environment.
- The RBI permits commercial banks with digital banking experience to establish DBUs in Tier I to Tier VI cities, without prior approval unless restricted.
- RRBs, payment banks, and local area banks are not eligible.
- In October 2022, as part of India’s 75th independence anniversary, 75 DBUs were launched across 75 remote districts to promote financial inclusion and bring banking services closer to citizens in semi-urban and rural areas.
Services and Features:
- DBUs offer digital services such as account opening, internet and mobile banking kits, debit and credit card applications, and UPI QR-based merchant solutions.
- Customers can apply online for retail loans, MSME loans, and government-sponsored schemes, with the entire process—from application to disbursal—handled digitally.
- Each DBU operates independently from existing branches and must follow RBI guidelines, including housing in separate premises with automated-only cash services.
- They are equipped with interactive teller machines, cash recyclers, document upload systems, and video KYC facilities.
- A senior bank executive is appointed as Chief Operating Officer (COO) to manage each unit.
Benefits Offered:
- DBUs offer a convenient, paperless banking experience, reducing the need to visit traditional branches.
- They support inclusive banking by expanding access to financial services in underserved regions.
- Customers in remote areas benefit from both automated and assisted service options.
- For banks, DBUs help optimize costs while improving service delivery and outreach.
| [UPSC 2024] Consider the following statements in respect of the digital rupee:
1. It is a sovereign currency issued by the Reserve Bank of India (RBI) in alignment with its monetary policy. 2. It appears as a liability on the RBI’s balance sheet. 3. It is insured against inflation by its very design. 4. It is freely convertible against commercial bank money and cash.
Which of the statements given above are correct?
Options: (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 4 only (d) 1, 2 and 4* |
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Why in the News?
The Centre for Earth Sciences and Himalayan Studies (CESHS) has successfully drilled India’s first geothermal production well in Dirang, located in Arunachal Pradesh’s West Kameng district.
This could potentially make Dirang the first geothermal-powered town in the country.
What is Geothermal Energy?
- Geothermal energy is derived from heat stored in the Earth’s interior, primarily from the decay of radioactive elements.
- It can be utilised for electricity generation, heating, and industrial applications.
- It is considered a renewable energy source as the Earth continuously generates heat.
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About Dirang Geothermal Project:
- This project in West Kameng, Arunachal Pradesh, is the first successful geothermal drilling site in Northeast India.
- It is led by CESHS under the Arunachal Pradesh Department of Science and Technology, with support from the Ministry of Earth Sciences.
- It is a medium-to-high enthalpy zone (~115°C), with a fault between quartzite and schist, enabling efficient, low-impact drilling.
- The site was selected after two years of geochemical and structural surveys, and can support applications like agricultural drying, space heating, and controlled storage.
- International partners include the Norwegian Geotechnical Institute, Geotropy ehf (Iceland), and Guwahati Boring Service for execution.
India’s Geothermal Landscape:
- The Geothermal Atlas of India (2022) identifies 381 thermally anomalous sites across the country.
- India has an estimated geothermal potential of 10,600 MW, enough to power over 10 million homes.
- Geothermal energy offers base load power, unlike intermittent solar and wind sources.
- The first operational plant was a 20 kW binary cycle pilot in Manuguru, Telangana, developed by SCCL.
- A 25 MW project in Khammam remains stalled due to tariff issues with the Andhra Pradesh Electricity Regulatory Commission.
- In Puga Valley, Ladakh, ONGC resumed work in 2024 on a 1 MW pilot plant, after a 2022 hot water leak raised safety concerns.
- In Dholera, Gujarat, geothermal energy is used for cooking and air conditioning at a temple, showing direct-use feasibility.
- India has signed MoUs with Iceland (2007) and Saudi Arabia (2019), and included geothermal energy in the 2023 RETAP agreement with the United States.
| [UPSC 2013] Consider the following: (1). Electromagnetic radiation (2). Geothermal energy (3). Gravitational force (4). Plate movements (5). Rotation of the earth (6). Revolution of the earth
Which of the above are responsible for bringing dynamic changes on the surface of the earth?
Options: (a) 1 only (b) 2 and 3 only (c) 1, 2 and 3 (d) None* |
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Why in the News?
India extended critical financial assistance to the Maldives by rolling over a $50 million Treasury Bill, continuing its support under a government-to-government arrangement since 2019.
About Treasury Bill:
- A T-Bill is a short-term debt instrument issued by the GoI through the Reserve Bank of India (RBI).
- They are part of Government Securities (G-Secs) and are used to raise short-term funds.
- They are zero-coupon securities, meaning they do not carry periodic interest payments.
- Instead, they are issued at a discount and redeemed at face value upon maturity.
- They were first introduced in India in 1917.
- They are ideal for investors seeking safety and liquidity over short periods.
Features of the T-Bills:
- Tenures Available: 91-day, 182-day, and 364-day maturity periods.
- Issued at a Discount: T-Bills are sold at a lower price than their face value. The return (yield) is the difference between purchase price and face value.
- Minimum Investment: Starts at ₹25,000, and in multiples of ₹25,000 thereafter.
- Zero-Coupon Nature: No interest payments during the tenure. Investors earn via the discounted purchase price.
- Risk-Free Investment: Backed by the Government of India, making it virtually risk-free.
- High Liquidity: Due to short tenure, T-Bills can be easily converted to cash.
- Auction Mechanism: Sold through competitive and non-competitive bidding at RBI auctions.
- Taxable Gains: Returns are treated as short-term capital gains and are taxable.
- Sensitive to Inflation: Fixed returns can be impacted by rising inflation, reducing real returns.
| [UPSC 2018] Consider the following statements:
1.The Reserve Bank of India manages and services GoI Securities but not any State Government Securities.
2.Treasury bills are issued by the GoI and there are no treasury bills issued by the State Governments.
3.Treasury bills offer are issued at a discount from the par value.
Which of the statements given above is/are correct?
Options: (a) 1 and 2 only (b) 3 only (c) 2 and 3 only * (d) 1, 2 and 3 |
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