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INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) KEY (08/11/2025)

INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) 2025 Daily KEY

 
 
 
 
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Right to Vote in India and  Cryogenic engine its significance for the UPSC Exam? Why are topics like Carbon Border Adjustment Mechanism (CBAM), Special Intensive Revision, Quantum advantage important for both preliminary and main exams? Discover more insights in the UPSC Exam Notes for November 08, 2025
 
 
 

Uncontested polls: Centre says right to vote different from freedom of voting

For Preliminary Examination:  Current eents of national and international Significance like Right to Vote in India

For Mains Examination: GS II - Indian Polity

Context:

The Centre has argued in the Supreme Court that the ‘right to vote’ in an election is different from the ‘freedom of voting’, and while one is a mere statutory right, the second is a part of the fundamental right to freedom of speech and expression.

 

Read about:

What is Right to Vote in India?

Article 19(1)(a)

 

Key takeaways:

 

The Right to Vote in India is one of the most essential features of its democratic framework. It symbolizes the sovereignty of the people and serves as the foundation of the representative system of government envisioned by the Constitution. Though often regarded as a fundamental democratic right, in legal terms, the right to vote in India is not a Fundamental Right but a statutory right granted under the provisions of the Representation of the People Act, 1951

 

Constitutional Basis

  • The Constitution of India, under Article 326, provides for elections to the House of the People (Lok Sabha) and the Legislative Assemblies of States on the basis of adult suffrage.
  • This means that every Indian citizen who is 18 years or older has the right to vote, regardless of religion, caste, gender, education, or economic status, as long as they are not disqualified under any law made by Parliament.
  • The concept of universal adult franchise was a revolutionary step at the time of Independence. Unlike many Western democracies that extended voting rights gradually, India conferred the right to vote on all adult citizens from the very beginning, reflecting the framers’ belief in political equality and inclusive participation.
 

Statutory Nature of the Right

  • While the Constitution sets the principle, the Representation of the People Act (RPA), 1951 gives the right to vote its operational form. It lays down who can be registered as a voter, how electoral rolls are prepared, and under what conditions a person can be disqualified from voting.
  • The Supreme Court of India in cases such as Jyoti Basu v. Debi Ghosal (1982) and People’s Union for Civil Liberties (PUCL) v. Union of India (2013) has clarified that the right to vote is not a Fundamental or Constitutional Right, but a statutory right created and regulated by legislation.
  • However, once the law grants that right, its exercise becomes a constitutional obligation, ensuring the democratic functioning of the State
 

Eligibility and Disqualification

Every Indian citizen aged 18 years or above, who is ordinarily resident in a constituency, is entitled to be registered as a voter. However, certain conditions can disqualify a person, such as:

  • Unsoundness of mind,

  • Non-citizenship,

  • Disqualification due to electoral offences or corrupt practices, and

  • Disqualification under any law made by Parliament.

 
 
Additional Information
 
  • The Union government has informed the Supreme Court that the “right to vote” and the “freedom of voting” are conceptually distinct. According to its argument, while the act of voting itself is merely a statutory right granted by law, the freedom to make one’s choice while voting is protected under the fundamental right to freedom of speech and expression guaranteed by Article 19(1)(a) of the Constitution.
  • The matter was listed for hearing before a Bench headed by Justice Surya Kant, though the Bench did not convene as scheduled.
  • The Centre’s submission came in response to a petition challenging the constitutionality of Section 53(2) of the Representation of the People Act, 1951, and Rule 11 read with Forms 21 and 21B of the Conduct of Elections Rules, 1961.
  • The petitioner contended that these provisions—dealing with uncontested elections—violate the fundamental right to free speech by denying voters the opportunity to express dissent through the ballot.
  • Under Section 53(2), when the number of contesting candidates is equal to the number of available seats, the Returning Officer (RO) must declare all such candidates duly elected, using Form 21 for general elections or Form 21B for by-elections. The Centre clarified that the “None of the Above” (NOTA) option cannot be treated as a candidate within the meaning of Section 79(b) of the Act. It further argued that elections cannot be left unresolved merely because voters choose NOTA, as doing so would undermine the purpose of the electoral process.
  • In a separate affidavit, the Election Commission of India (ECI) supported this stance, stating that recognizing NOTA as a contesting candidate would require legislative amendments to both the 1951 Act and the 1961 Rules.
  • The ECI also noted that from 1951 to 2024, there have been only nine uncontested elections in the country’s electoral history, underscoring the rarity of such situations
 
Follow-Up Question
 
Mains
 
1.The distinction between the right to vote as a statutory entitlement and the freedom of voting as a facet of the fundamental right to freedom of expression has significant constitutional and democratic implications.

Discuss this distinction in the context of uncontested elections and the role of the “NOTA” option under the Representation of the People Act, 1951. (250 words)

 
Note: This is a refrence approach to the Question and Model Answer Only
 

Introduction (40–50 words)

Begin by introducing the constitutional and legal context of the right to vote. Mention that while voting operationalizes the principle of popular sovereignty, its legal nature and scope have been debated, particularly regarding the relationship between the statutory right to vote and the fundamental right to express one’s choice.

Body (150–170 words)

(a) The Legal and Constitutional Distinction

  • Right to vote: Derives from the Representation of the People Act, 1951 — a statutory right, not guaranteed directly by the Constitution (Jyoti Basu v. Debi Ghosal, 1982).

  • Freedom of voting: Once granted by law, its exercise — the choice of whom to vote for or to abstain — is part of the freedom of speech and expression under Article 19(1)(a) (PUCL v. Union of India, 2013).

  • Thus, while the right to vote is statutory, the freedom to make a choice while voting is fundamental.

(b) Context of Uncontested Elections and NOTA

  • Under Section 53(2) of the RPA, 1951, if the number of candidates equals the number of available seats, the Returning Officer declares them elected without polling.

  • The petitioner contends this violates Article 19(1)(a) by denying voters an opportunity to express dissent through NOTA (None of the Above).

  • The Centre and ECI argue that NOTA is not a candidate under Section 79(b), and elections cannot remain inconclusive merely because voters prefer NOTA.

  • The debate raises deeper questions about voter autonomy, freedom of expression, and democratic choice in a representative system.

Conclusion (30–40 words)

End with a balanced evaluation linking constitutional ideals with practical realities.

Introduction:

The right to vote is the cornerstone of India’s representative democracy, reflecting the principle of popular sovereignty. While the Constitution provides for universal adult suffrage under Article 326, the legal framework for voting arises from the Representation of the People Act (RPA), 1951. However, courts and the government have drawn a distinction between the statutory right to vote and the freedom of voting, which has been recognized as a facet of the fundamental right to freedom of speech and expression under Article 19(1)(a)

 

 

Body:

  • The RPA, 1951 confers the right to vote through statutory provisions, as affirmed in Jyoti Basu v. Debi Ghosal (1982) — meaning that citizens possess this right because Parliament has granted it by law, not inherently through the Constitution.
  • Yet, once the law grants this right, the act of making a choice — whether to vote for a candidate or to abstain — has been held by the Supreme Court in PUCL v. Union of India (2013) to fall within the freedom of expression, thus giving it a fundamental character.
  • This distinction has come under focus in challenges to Section 53(2) of the RPA, which allows uncontested elections — when candidates equal seats, the Returning Officer declares them elected without polling.
  • The petitioners argue this denies voters their expressive choice through NOTA (None of the Above).
  • The Centre and the Election Commission of India contend that NOTA is not a “candidate” under Section 79(b) and cannot render elections inconclusive.
  • While this ensures procedural certainty, it arguably curtails voter autonomy and freedom of dissent, both essential to electoral democracy.

Conclusion:

Though the right to vote remains a statutory creation, the freedom to vote — or not to vote — is constitutionally significant for ensuring free and fair elections under Article 324. Strengthening mechanisms for voter expression, including in uncontested elections, would deepen India’s democratic ethos by ensuring that every citizen’s voice, even dissent, finds legitimate space in the electoral process

 
 
 
Prelims
 
1.The Voter Verifiable Paper Audit Trail (VVPAT) system was used for the first time by the Election Commission of India in (UPSC CAPF 2019)
 
North Paravur Assembly Constituency, Kerala
B.Noksen Assembly Constituency, Nagaland
C.Mapusa Assembly Constituency, Goa
D.Nambol Assembly Constituency, Manipur
 
Answer (B)
 

The Voter Verifiable Paper Audit Trail (VVPAT) system was first used by the Election Commission of India (ECI) in the Noksen Assembly Constituency of Nagaland during the bye-election held in September 2013.

VVPAT allows voters to verify that their vote has been recorded correctly by displaying a printed slip showing the symbol and name of the candidate they voted for, for about seven seconds before it drops into a sealed box.

It was later used widely across all constituencies in the 2019 Lok Sabha elections to enhance transparency and voter confidence in Electronic Voting Machines (EVMs)
 
 
 
For Preliminary Examination:  Current events of national and international Significance
 
For Mains Examination: GS III - Science and technology
 
Context:
 
In its first launch in three months, ISRO will use its biggest rocket LVM-3 to send a communication satellite CMS-03 to space Sunday evening. This is the first time that ISRO will put a satellite weighing over 4,000 kg in the distant geosynchronous transfer orbit (GTO) from the Indian soil.
 
Read about:
 
What are the various launch vehicles of ISRO and what are their specifications?
 
What is a cryogenic engine?
 
 
Key takeaways:
 
 
  • The Small Satellite Launch Vehicle (SSLV) developed by ISRO is a compact, three-stage rocket powered by solid fuel in all its main stages. It also features a Velocity Trimming Module (VTM) — a liquid propulsion-based system used in the final phase of flight to fine-tune the rocket’s speed and precisely position satellites in orbit.
  • The Polar Satellite Launch Vehicle (PSLV), introduced in 1994, represents the third generation of Indian launch vehicles. Having completed over 50 successful missions, it has earned the title of “ISRO’s workhorse” for its reliability in deploying satellites into Low Earth Orbit (LEO) — typically below 2,000 kilometres altitude.
  • For launching heavier payloads into higher orbits, ISRO developed the Geosynchronous Satellite Launch Vehicle (GSLV). These rockets are used primarily to place communication satellites into Geosynchronous Transfer Orbit (GTO) — a transitional path leading to Geostationary Earth Orbit (GEO), located roughly 35,786 kilometres above the equator.
  • Since placing satellites in such distant orbits demands greater energy, GSLVs employ cryogenic engines, which use liquid hydrogen and liquid oxygen as propellants. These engines provide significantly higher thrust than earlier liquid-fuel engines, making them ideal for long-distance missions.
  • As per NASA, to reach a geosynchronous orbit, a spacecraft first enters an elliptical GTO, with its farthest point (apoapsis) near 37,000 km from Earth. Once it reaches that point, the spacecraft fires an apogee motor to circularize its orbit — a process that determines the final geostationary position.
  • One of ISRO’s recent communication satellites, CMS-03, weighing 4,410 kg, was placed in a transfer orbit of 29,970 km × 170 km. Historically, ISRO had to rely on foreign launch providers — such as Arianespace or SpaceX — for placing such heavy satellites in orbit.
  • However, this situation is changing with the rise of Launch Vehicle Mark-3 (LVM-3), previously known as GSLV Mk-III. This rocket is capable of carrying up to 8,000 kg to Low Earth Orbit and about 4,000 kg to Geosynchronous Orbit.
  • It uses a combination of solid, liquid, and cryogenic engines, and a modified version will power India’s Gaganyaan mission, which aims to send humans into space.
  • In earlier missions, India’s heaviest satellites — such as GSAT-11 (5,854 kg) and GSAT-24 (4,181 kg) — were launched by Arianespace, while the 4,700-kg GSAT-20 was deployed by SpaceX.
  • To launch heavier payloads domestically, ISRO has been optimizing the LVM-3 by slightly lowering the orbit altitude, thereby compensating for mass beyond its 4,000-kg GTO limit.
  • To further enhance payload capacity, ISRO is upgrading the cryogenic upper stage, which contributes nearly half of the velocity needed to achieve GTO. The current C25 stage carries 28,000 kg of propellant and produces 20 tonnes of thrust. The upcoming C32 version will carry 32,000 kg of propellant and deliver 22 tonnes of thrust.
  • Additionally, ISRO plans to replace the second-stage liquid engine with a semi-cryogenic engine that uses refined kerosene and liquid oxygen.
  • This innovation is expected to boost efficiency, lower costs, and increase payload capacity — enabling the rocket to carry up to 10,000 kg to LEO, compared to the present limit of 8,000 kg.
  • In the long term, ISRO is working on an ambitious Lunar Module Launch Vehicle (LMLV) — a next-generation heavy-lift system designed to transport up to 80,000 kg into Low Earth Orbit. This vehicle will form the foundation for future human missions to the Moon, marking a major leap in India’s space exploration capabilities
 
Follow Up Question
 
Mains
 
1.Discuss the evolution of India’s launch vehicle programme with special reference to the recent developments in GSLV Mk-III (LVM-3) and future initiatives like the Lunar Module Launch Vehicle (LMLV) (Answer in 250 words)
 
Note: This is a refrence approach to the Question and Model Answer Only
 

Introduction (40–50 words)

  • Begin by contextualising India’s space journey — from early dependence on foreign launchers to present-day indigenous capabilities.

  • Mention ISRO as the driving force behind this transformation.

  • End with a transition line linking to recent developments

Body (150–170 words)

(a) Evolutionary Phase

  • SLV and ASLV: Early stages focused on mastering multi-stage solid propulsion and orbital insertion.

  • PSLV: Marked operational reliability and commercial success — over 50 successful launches, placing satellites in polar and sun-synchronous orbits.

  • Transition: Need for launching heavier communication satellites led to GSLV.

(b) Technological Advancements – GSLV to LVM-3

  • GSLV: Introduction of cryogenic engines enabled geosynchronous launches.

  • GSLV Mk-III / LVM-3: India’s heavy-lift vehicle (8,000 kg to LEO, 4,000 kg to GTO).

    • Used in Chandrayaan-2, OneWeb missions.

    • Will power Gaganyaan human spaceflight mission.

    • Integration of solid, liquid, and cryogenic propulsion for high thrust.

(c) Future Developments – Towards Greater Self-Reliance

  • Development of C32 cryogenic stage and semi-cryogenic engine (refined kerosene + liquid oxygen).

  • Aim to enhance payload to 10,000 kg LEO capacity.

  • LMLV: Future deep-space vehicle (up to 80,000 kg to LEO), designed for human lunar missions

 

Conclusion (30–40 words)

  • Summarise India’s journey towards self-reliance and global competitiveness.

  • Highlight its strategic and economic significance

Introduction:

India’s space journey, led by the Indian Space Research Organisation (ISRO), has transformed from launching small experimental payloads in the 1970s to deploying heavy communication satellites and planning human spaceflight missions today. The continuous evolution of launch vehicle technology—marked by the development of PSLV, GSLV, and LVM-3—reflects India’s growing capability and self-reliance in accessing space.

Body:

1. Evolution of India’s Launch Vehicle Programme:

  • ISRO began with Satellite Launch Vehicle (SLV) in the 1980s, capable of launching small payloads into Low Earth Orbit (LEO).

  • The Augmented Satellite Launch Vehicle (ASLV) followed, enhancing payload capacity and testing staging technologies.

  • The Polar Satellite Launch Vehicle (PSLV), operational since 1994, became ISRO’s most reliable launcher—successfully deploying over 50 missions into polar and sun-synchronous orbits, earning the title “the workhorse of ISRO.”

2. Advancements in Heavy-Lift Launch Vehicles:

  • The Geosynchronous Satellite Launch Vehicle (GSLV) series enabled India to place communication satellites into Geosynchronous Transfer Orbit (GTO) using cryogenic engines—a major technological breakthrough.

  • The GSLV Mk-III (now LVM-3), capable of carrying 8,000 kg to LEO and 4,000 kg to GTO, represents India’s entry into the heavy-lift category.

  • It integrates solid, liquid, and cryogenic propulsion systems, and a modified version will power the Gaganyaan human spaceflight mission.

3. Future Initiatives – Towards Greater Capacity and Deep Space Missions:

  • ISRO is developing an upgraded C32 cryogenic stage and semi-cryogenic engines using refined kerosene and liquid oxygen, expected to raise payload capacity to 10,000 kg to LEO.

  • The planned Lunar Module Launch Vehicle (LMLV) aims to carry up to 80,000 kg for future lunar and deep-space missions, paving the way for India’s human lunar exploration

Conclusion:

India’s progress in launch vehicle technology reflects its commitment to Atmanirbhar Bharat (self-reliant India) and strategic autonomy in space. The evolution from PSLV to LVM-3, and future projects like LMLV, underscore ISRO’s vision of transforming India into a global space power, capable of independent, sustainable, and cost-effective space exploration

 
 
 
 
Prelims
 
1.With reference to India's satellite launch vehicles, consider the following statements: (UPSC 2018)
1. PSLVs launch satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites.
2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.
3. GSLV Mk III is a four- staged launch vehicle with the first and third stages using solid rocket motors; and the second and fourth stages using liquid rocket engines.
Which of the statements given above is/are correct?
A. 1 only
B. 2 and 3
C. 1 and 2
D. 3 only
 
Answer (A)
 

Statement 1: ✅ Correct

  • PSLV (Polar Satellite Launch Vehicle) is primarily used for launching Earth observation and remote sensing satellites into Polar Sun-Synchronous Orbits (SSO) — ideal for Earth resource monitoring.

  • GSLV (Geosynchronous Satellite Launch Vehicle) is designed mainly to place communication satellites into Geostationary or Geosynchronous Transfer Orbits (GTO).

Statement 2: ❌ Incorrect

  • Satellites that appear fixed in the sky (as viewed from Earth) are placed in Geostationary Orbits (GEO) — not Polar orbits.

  • PSLV launches satellites into polar orbits, where the satellite moves relative to the Earth’s surface — hence, it does not remain fixed in the sky

Statement 3: ❌ Incorrect

  • GSLV Mk III (now called LVM3) is a three-stage launch vehicle — not four-stage.

    • 1st Stage: Solid rocket boosters (S200)

    • 2nd Stage: Liquid engine (L110)

    • 3rd Stage: Cryogenic upper stage (C25) using liquid hydrogen & liquid oxygen

  • Hence, the description given in the statement is wrong
 
 
 

Indian iron and steel exporters face the highest CBAM levy

For Preliminary Examination: Current events of national and international Significance

For Mains Examination: GS III - Environment and Ecology

Context:

Indian exporters of iron and steel to EU may have to pay about €301 million (approximately ₹3,000 crore) in Carbon Border Adjustment Mechanism (CBAM) fees, the highest among all countries exporting similar products to the EU, an analysis by European non-profit think-tank Sandberg has found

 

Read about:

 Carbon Border Adjustment Mechanism (CBAM)

Greenhouse gas (GHG) emissions

 

Key takeaways

 

  • The Carbon Border Adjustment Mechanism (CBAM) is a policy tool introduced by the European Union (EU) to address the issue of “carbon leakage” — a situation where industries shift production to countries with weaker climate regulations to avoid the costs of reducing greenhouse gas emissions.
  • Essentially, CBAM ensures that imported goods into the EU face a carbon price equivalent to what EU producers pay under the EU’s Emissions Trading System (ETS).
  • Under the EU’s climate policies, industries within the region are required to purchase carbon credits for every tonne of carbon dioxide they emit. This system creates a financial incentive to adopt cleaner technologies and reduce emissions.
  • However, if foreign producers exporting to the EU are not subject to similar carbon pricing in their home countries, they gain a cost advantage. The CBAM aims to neutralize this imbalance by imposing a carbon tariff on such imports.
  • The mechanism initially covers carbon-intensive sectors such as iron and steel, cement, aluminum, fertilizers, electricity, and hydrogen—areas that are both energy-intensive and highly traded globally. Importers in the EU will need to report the embedded emissions of their products and purchase corresponding CBAM certificates to cover these emissions. The price of these certificates will mirror the price of carbon within the EU’s ETS.
  • For developing countries, including India, CBAM raises significant concerns. It could act as a trade barrier by making exports to the EU more expensive if domestic producers cannot demonstrate low carbon footprints. This may also pressure developing economies to adopt stricter climate measures and carbon accounting mechanisms to maintain export competitiveness.
  • In essence, the CBAM represents a major step in linking global trade with climate policy. While it supports the EU’s goal of achieving net-zero emissions by 2050, it also introduces new dynamics in international trade, prompting debates on climate justice, fairness, and the responsibilities of developed versus developing nations in combating global warming

 

 Additional Information

  • According to a recent analysis by the European think tank Sandberg, Indian exporters of iron and steel to the European Union (EU) may incur approximately €301 million (about ₹3,000 crore) in charges under the Carbon Border Adjustment Mechanism (CBAM)—the highest liability among all nations exporting similar products to the bloc.
  • The CBAM functions as a carbon levy imposed on European importers who purchase goods from countries where production generates higher carbon emissions per tonne than comparable goods produced within the EU.
  • Sandberg’s newly released online calculator estimates that Russia will face the second-highest CBAM costs at €240 million, followed by Ukraine (€198 million) and China (€194 million).
  • The study further reveals that when India’s exports of aluminium and cement are included alongside iron and steel, its total CBAM liability amounts to around €330 million, equivalent to roughly 1.05% of the value of all traded goods.
  • However, it also highlights a potential opportunity — Indian industries could increase revenues by about €510 million if they adopt cleaner and more energy-efficient technologies, thereby offsetting nearly €180 million in net costs.
  • India has, however, consistently voiced opposition to the CBAM, with several industry associations labelling it a form of “non-tariff barrier” that could adversely affect the competitiveness of Indian exports in European markets

 

 Follow Up Question

Mains

1.“The European Union’s Carbon Border Adjustment Mechanism (CBAM) represents a new intersection between climate policy and international trade.”
Critically examine the implications of CBAM for India’s exports and its alignment with the principles of climate justice and the WTO framework. Suggest measures India can adopt to mitigate its economic and environmental impact.

 

Note: This is just a model answer and a Model Structure model
 

Introduction (40–50 words)

  • Begin by defining CBAM and its objective.

  • Mention its link with the EU’s Emissions Trading System (ETS) and the goal of preventing carbon leakage.

  • Briefly state that while it supports climate action, it raises trade and equity concerns for developing nations like India.

Example:
The Carbon Border Adjustment Mechanism (CBAM) is a carbon pricing policy introduced by the European Union to equalize the cost of carbon emissions between EU and non-EU producers. While intended to curb carbon leakage, it raises critical questions on fairness, trade equity, and climate justice, especially for developing economies such as India.

Body (150–170 words)

(a) Implications for India’s Exports

  • Mention key affected sectors: iron & steel, aluminium, cement, fertilizers, hydrogen, electricity.

  • Quote the Sandberg analysis — India may face €330 million in annual CBAM liability.

  • Discuss how this affects export competitiveness, especially for carbon-intensive sectors.

  • Highlight compliance and administrative costs for Indian exporters.

(b) Broader Concerns

  • Climate justice: Developing nations like India are being penalized despite lower historical emissions.

  • WTO compatibility: CBAM could violate non-discrimination principles and act as a “green protectionist” measure.

  • Equity issue: Contradicts the Common But Differentiated Responsibilities (CBDR) principle under the Paris Agreement.

(c) Opportunities

  • Potential to push Indian industries toward cleaner technologies and low-carbon manufacturing.

  • Scope for attracting green investment and developing carbon accounting mechanisms.

(d) Measures for Mitigation

  • Invest in renewable energy and green hydrogen.

  • Establish a domestic carbon pricing or trading system.

  • Strengthen climate diplomacy at WTO and COP forums.

  • Seek technology transfer and financial support from developed nations

onclusion (30–40 words)

  • Sum up with a balanced view: CBAM is a step toward global carbon accountability but must be fair and inclusive.

  • Emphasize the need for equitable climate action and cooperative trade mechanisms.

Example:
While CBAM reinforces global climate goals, its unilateral nature challenges the equity principle of international climate governance. India must combine green transition with assertive diplomacy to safeguard both its economic and environmental interests

Introduction

The Carbon Border Adjustment Mechanism (CBAM), introduced by the European Union (EU), aims to impose a carbon price on imports equivalent to that paid by EU producers under its Emissions Trading System (ETS). It seeks to prevent “carbon leakage,” where industries relocate to countries with weaker emission norms. However, it has sparked global debate for potentially acting as a green trade barrier.

Body

CBAM initially targets carbon-intensive sectors such as iron and steel, cement, aluminium, fertilizers, hydrogen, and electricity. According to a study by the European think tank Sandberg, Indian exporters could face CBAM costs of around €330 million annually, the highest among major trading nations.

For India, this poses multiple challenges:

  • Trade competitiveness: Higher tariffs could reduce export margins, particularly for small and medium producers.

  • Compliance burden: Complex reporting on embedded emissions adds costs and administrative hurdles.

  • Climate justice concerns: CBAM penalizes developing nations despite their lower per capita emissions and limited historical responsibility for climate change.

  • WTO conflict: The mechanism may violate non-discrimination principles under the World Trade Organization (WTO) if perceived as protectionist.

To mitigate these effects, India should accelerate the decarbonization of industry, promote green hydrogen and renewable energy adoption, develop a domestic carbon pricing framework, and pursue diplomatic engagement to ensure fair climate financing and technology transfers

Conclusion

While CBAM aligns with the EU’s goal of achieving net-zero emissions by 2050, its unilateral nature risks deepening global trade inequities. India must balance climate responsibility with economic pragmatism through green innovation, diplomatic dialogue, and resilient trade strategies that safeguard both sustainability and growth
 
 
Prelims
 

1.Which of the following adopted a law on data protection and privacy for its citizens known as ‘General Data Protection Regulation’ in April, 2016 and started implementation of it from 25th May, 2018? (UPSC CSE 2019)

(a) Australia
(b) Canada
(c) The European Union
(d) The United States of America

 
Answer (c)
 

The General Data Protection Regulation (GDPR) is a comprehensive data protection law adopted by the European Union (EU) in April 2016, and it came into effect on 25th May 2018.

It establishes strict rules on how personal data of EU citizens can be collected, processed, stored, and transferred — both within the EU and by entities outside it that handle EU residents’ data.

The GDPR gives individuals greater control over their personal information through rights such as:

  • Right to access and correct their data,

  • Right to be forgotten, and

  • Right to data portability.

It also mandates organizations to obtain explicit consent for data processing and to report data breaches promptly.

The regulation has become a global benchmark for privacy and data protection laws, influencing similar frameworks in several countries, including India’s Digital Personal Data Protection Act, 2023
 
 
 
 
 
 
For Preliminary Examination:  Current events of national and international Significance like SIR
For Mains Examination: GS II - Indian Polity
 
Context:
 
The Election Commission (EC) on Monday announced the Special Intensive Revision (SIR) of electoral rolls in 12 states and Union Territories, where all of the registered 51 crore electors would have to submit enumeration forms by December 4 to remain on the draft roll
 
Read about:
 
What is the Special Intensive Revision?
 
Election Commission of India, its powers and functions
 
Key takeaways:
 
 
  • Article 324(1) of the Indian Constitution empowers the Election Commission of India (ECI) with the authority to exercise superintendence, direction, and control over the preparation of electoral rolls and the conduct of elections for Parliament and state legislatures.
  • Additionally, under Section 21(3) of the Representation of the People Act, 1950, the Commission may, at any point, order a special revision of electoral rolls for any constituency or part thereof, in a manner it deems appropriate.
  • According to the Registration of Electors’ Rules, 1960, the revision of electoral rolls may be carried out either intensively, summarily, or through a combination of both methods, depending on the ECI’s directions.
  • An intensive revision involves preparing the rolls afresh, while a summary revision focuses on updating and correcting the existing lists. During the current exercise, individuals who cannot be traced back to the last major revision held between 2002 and 2005 will need to produce documents verifying their eligibility to remain on the electoral list.
  • The special revision is being undertaken across several regions, including Andaman and Nicobar Islands, Chhattisgarh, Goa, Gujarat, Kerala, Lakshadweep, Madhya Pradesh, Puducherry, Rajasthan, Tamil Nadu, Uttar Pradesh, and West Bengal.
  • The ECI expanded the acceptable document list from 11 to 13, now including Aadhaar and the Bihar SIR roll extract. Persons born after July 1, 1987, must provide eligibility documents for themselves and their parents.
  • The second phase of the Special Intensive Revision (SIR) will begin on November 4, involving over 5.33 lakh Booth Level Officers (BLOs) conducting door-to-door verification. The draft rolls will be published on December 9, incorporating all received applications.
  • Assam has been temporarily excluded due to ongoing proceedings related to the National Register of Citizens (NRC) under Supreme Court supervision. Chief Election Commissioner Gyanesh Kumar clarified that Assam’s electoral roll revision will be conducted separately due to distinct legal provisions under the Citizenship Act.
  • The ECI justified the SIR by noting persistent concerns from political parties about inaccuracies in voter lists. The last such nationwide exercise occurred in 2004, and since then, issues such as migration, duplicate registrations, non-deletion of deceased voters, and wrongful inclusions have compromised the integrity of electoral rolls.
  • Meanwhile, the June 24 order initiating the nationwide SIR—beginning with Bihar—has been challenged in the Supreme Court, with petitions questioning the ECI’s authority to verify citizenship and the procedures followed during the revision process
 
Follow Up Question
 
Mains
 
1.The Election Commission of India’s decision to conduct a Special Intensive Revision (SIR) of electoral rolls has raised questions about the balance between ensuring electoral purity and safeguarding citizens’ rights. Discuss the constitutional and legal basis of the SIR and critically analyze the concerns associated with its implementation (250 Words)
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only

Introduction (40–50 words)

Begin with a clear definition of the Special Intensive Revision (SIR) and its objective. Mention its legal grounding in the constitutional and statutory framework.

Constitutional and Legal Basis (70–80 words)

Explain the legal provisions that empower the ECI to carry out SIR.

Points to include:

  • Article 324(1): Grants the ECI the power of superintendence, direction, and control over electoral roll preparation and conduct of elections.

  • Section 21(3) of the Representation of the People Act, 1950: Allows the ECI to order a special revision of electoral rolls at any time.

  • Registration of Electors’ Rules, 1960: Permits revisions to be done either intensively (fresh rolls) or summarily (modification of existing rolls).

Rationale and Significance (50–60 words)

Describe why SIR was initiated and its importance in the democratic process.

Points to include:

  • Addresses long-standing complaints of “impure rolls” — duplicate entries, inclusion of deceased voters, and wrongful registrations.

  • Ensures a clean and credible voter list, which is essential for free and fair elections.

  • Helps restore public confidence in electoral integrity.

Concerns and Challenges (70–80 words)

Critically analyze the issues and controversies surrounding the SIR process.

Points to include:

  • Citizenship verification concerns: Risk of conflating voter eligibility checks with citizenship determination, especially post-NRC debates.

  • Potential disenfranchisement: Vulnerable groups such as migrants, minorities, and the poor may face documentation challenges.

  • Legal ambiguity: Critics argue that the ECI may be exceeding its mandate under Article 324 by verifying citizenship.

  • Administrative burden: Large-scale enumeration involving millions of voters poses logistical and accuracy challenges.

  • Judicial scrutiny: The SIR order has been challenged in the Supreme Court, raising questions about its constitutional validity.

Conclusion (30–40 words)

End with a balanced view acknowledging the intent of electoral integrity while emphasizing safeguards for inclusivity and fairness.

Introduction:

The Special Intensive Revision (SIR) of electoral rolls, recently initiated by the Election Commission of India (ECI), aims to ensure the accuracy and purity of voter lists by identifying and correcting errors such as duplicate, deceased, or ineligible entries. The exercise derives its authority from Article 324(1) of the Constitution, which empowers the ECI with the superintendence, direction, and control over the preparation of electoral rolls and conduct of elections. Additionally, Section 21(3) of the Representation of the People Act, 1950 allows the ECI to direct a special revision at any time, while the Registration of Electors’ Rules, 1960 prescribes that such revisions may be carried out either intensively or summarily

Body:

The SIR is significant for strengthening the credibility and transparency of India’s electoral process. It addresses persistent concerns raised by political parties regarding “impure” electoral rolls—such as wrongful inclusions, multiple registrations, or omission of eligible voters. By revising rolls afresh, the ECI seeks to uphold the principle of free and fair elections, which forms the cornerstone of Indian democracy.

However, several concerns have emerged. Critics argue that the process risks conflating voter eligibility with citizenship verification, especially in light of past controversies like the National Register of Citizens (NRC). The requirement for documentary proof may disproportionately impact vulnerable groups—migrants, minorities, and the poor—potentially leading to disenfranchisement. Additionally, questions have been raised regarding the scope of the ECI’s powers under Article 324, and petitions challenging the SIR are currently pending before the Supreme Court

Conclusion:

While the SIR reflects the ECI’s resolve to preserve electoral integrity, it must be implemented with constitutional prudence, ensuring that the goal of clean voter rolls does not compromise citizens’ right to vote, inclusivity, or public trust in democratic institutions

 
 
Prelims
 
1.Consider the following statements: (UPSC 2017)
1. The Election Commission of India is a five-member body.
2. Union Ministry of Home Affairs decides the election schedule for the conduct of both general elections and bye-elections.
3. Election Commission resolves the disputes relating to splits/mergers of recognized political parties.
Which of the statements given above is/are correct?
A. 1 and 2 only
B. 2 only
C. 2 and 3 only
D. 3 only
 
 
Answer (D)
 

The Election Commission of India is a five-member body.
❌ Incorrect.
The Election Commission of India (ECI) is not a fixed five-member body.

  • Under Article 324(2) of the Constitution, the ECI consists of the Chief Election Commissioner (CEC) and such number of other Election Commissioners as the President may from time to time fix.

  • Usually, it has three members — one CEC and two Election Commissioners.
    Hence, the number is not fixed at five.

The Union Ministry of Home Affairs decides the election schedule for the conduct of both general elections and bye-elections.
❌ Incorrect.
The Election Commission of India — not the Ministry of Home Affairs — is responsible for deciding the election schedule and supervising the entire electoral process for Parliament and State Legislatures under Article 324(1)
Election Commission resolves the disputes relating to splits/mergers of recognized political parties.
✅ Correct.
Under the Election Symbols (Reservation and Allotment) Order, 1968, the ECI has the power to decide disputes related to splits and mergers of recognized political parties and to determine which faction is entitled to use the party’s name or symbol
 
 
 

What is Google’s ‘quantum advantage’ leap?

For Preliminary Examination:  Current events of national and international Significance

For Mains Examination: GS III - Science and technology

Context:

In two papers published in Nature on October 22, researchers from Google, MIT, Stanford, and Caltech reported what they called a verifiable display of quantum advantage using the company’s Willow quantum processor. That is, the teams said they have shown that Willow clearly outperforms existing supercomputers on solving a specific problem

 

Read about:

What is quantum advantage?

Decoded Quantum Interferometry (DQI)

 

Key takeaways:

 

How does a quantum computer work?

  • Think of ripples spreading across a pond: when two wave crests meet, they combine to form a larger wave, but when a crest meets a trough, they cancel each other out. This phenomenon, known as interference, is key to quantum computing.
  • At the quantum scale, particles exhibit wave-like behavior, and their wave functions—which describe the probabilities of different outcomes—can be controlled to interfere constructively or destructively.
  • By managing these interferences, scientists enhance the likelihood of obtaining the correct solution while suppressing incorrect ones. This is the fundamental operating principle of a quantum computer.
  • In one study, researchers created a quantum algorithm to handle optimization problems, where the aim is to identify the best outcome among many options. They called this method Decoded Quantum Interferometry (DQI).
  • It uses a quantum version of the Fourier transform to manipulate the wave-like behavior of particles acting as quantum bits (qubits). In DQI, waves representing good solutions strengthen one another through constructive interference, while those representing poor solutions cancel out.
  • When measured, the quantum system is thus more likely to reveal a high-quality solution. The algorithm efficiently solved the optimal polynomial intersection problem, outperforming classical computers

 

What is scrambling?

  • The second study examined how information disperses—or gets “scrambled”—in complex quantum systems. Imagine adding a drop of blue dye into a clear swimming pool.
  • Initially, the dye is localized, but as it spreads, the color becomes faint and uniform throughout the pool. The information about the dye’s exact position is no longer visible, yet it’s not lost—it’s simply distributed across every water molecule.
  • Similarly, in a quantum system, information initially contained in a single qubit spreads across all interacting qubits, becoming hidden within their intricate relationships.
  • To measure this scrambling, scientists designed an experiment resembling echoes in a warehouse. When someone shouts, the sound waves bounce off every surface, dispersing information.
  • A moment later, striking a bell alters part of the echo, imprinting it with a distinct tone. When the experiment is “rewound,” normal echoes cancel out, but those with the bell’s imprint remain as faint, distorted sounds.
  • This residual echo, called the Out-of-Time-Order Correlator (OTOC), reveals how widely the original information has spread within the system. By studying these subtle signals, researchers can quantify how quantum information mixes and evolves

How do you demonstrate quantum advantage?

  • In another experiment, scientists used highly complex quantum circuits that would have taken a top supercomputer over three years to simulate, but the Willow quantum processor completed them in about two hours.
  • This highlights quantum advantage—where a quantum computer outperforms the fastest classical systems.
  • However, researchers have not yet proved mathematically that no classical shortcut could solve these problems equally fast. Further work is needed to confirm that such challenges are inherently difficult for non-quantum computers.
  • While these studies show impressive progress, their tasks remain laboratory demonstrations rather than practical applications.
  • Real-world breakthroughs in fields like physics or chemistry will require advances in error correction, scalability, and the development of thousands of stable qubits—an achievement still several years away
 
Follow Up Question
 
Mains
 
1.Quantum interference and information scrambling lie at the heart of quantum computing. Discuss how recent advances in these areas demonstrate the potential of quantum computers to outperform classical systems, while highlighting the challenges that remain before achieving practical quantum advantage.”
(250 words)
 
Note: This is for reference Only - Reference Mains Structure and Reference midel Answer Only
 

Introduction (40–50 words)

Start with context: technological evolution and computational limits.
Define quantum computing and its significance.

Body

A. Scientific and Conceptual Background (60–70 words)

Explain fundamental principles and DQI innovation.
Mention wave interference, optimization, and quantum algorithms.

Key points:

  • Quantum computing uses qubits that exist in multiple states simultaneously.

  • DQI algorithm manipulates particle wave interference via the quantum Fourier transform to enhance probabilities of correct solutions.

  • Designed for solving optimization problems like polynomial intersections faster than classical systems.

  • Demonstrates controlled quantum interference to amplify desired computational results.

Effectiveness and Positive Aspects (60–70 words)

Highlight scientific breakthroughs and potential impact.

Key points:

  • Willow processor completed tasks in 2 hours that would take supercomputers over 3 years.

  • Marks progress toward practical demonstration of quantum advantage.

Conclusion (40–50 words)

Summarize balanced view and suggest the way forward.

Introduction:
Quantum computing harnesses the principles of quantum mechanics — particularly superposition and interference — to process information in ways that classical computers cannot. Unlike traditional bits, quantum bits (qubits) can exist in multiple states simultaneously, allowing for exponential computational possibilities.

Body:
At the core of quantum computation lies quantum interference, the phenomenon where wave-like probabilities of quantum states reinforce correct solutions and cancel incorrect ones. Recently, researchers proposed the Decoded Quantum Interferometry (DQI) algorithm, which manipulates these wave functions through a quantum version of the Fourier transform. This enables constructive interference for optimal solutions, providing a significant speed advantage in solving complex optimization problems.

Complementing this, studies on information scrambling reveal how data in a quantum system gets rapidly distributed across entangled qubits. By measuring this scrambling using advanced processors like Willow, scientists demonstrated the capacity of quantum systems to simulate complex, highly interactive environments far beyond the reach of classical machines.

These advances mark early evidence of quantum advantage, where quantum devices outperform even the fastest supercomputers in specific tasks.

Conclusion:
While promising, these breakthroughs remain largely experimental. Challenges such as error correction, decoherence, and scaling stable qubits persist. Achieving practical and reliable quantum computing will require overcoming these hurdles, but current progress clearly signals a transformative leap in computational science
 
Prelims
 
1.Which one of the following is the context in which the term "qubit" is mentioned? (UPSC 2022)

A. Cloud Services

B. Quantum Computing

C. Visible Light Communication Technologies

D. Wireless Communication Technologies

Answer (B)
 

  • A qubit (quantum bit) is the basic unit of information in quantum computing.

  • Unlike a classical bit, which can be either 0 or 1, a qubit can exist in a superposition of both states simultaneously.

  • This property allows quantum computers to perform complex computations much faster than traditional computers.

Other options (Incorrect):

  • A. Cloud Services: Related to remote data storage and computing, not qubits.

  • C. Visible Light Communication: Uses light for data transmission, not quantum principles.

  • D. Wireless Communication: Involves radio frequency signals, not quantum information
 
 

Subject Wise Topics

Topic Description
1. Fundamental Rights (Polity) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=3
2. Doctrine of Lapse (Modern Indian History) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=386
3. Monetary Policy (Economy) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=182
4. Environment Pollution (Environmnet and Ecology) https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=158
5. Physical features of India https://upscexamnotes.com/topic-wise-articles/article.php?subtopic=572

 

 

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