GK One-Liners

What: National Science Day is celebrated annually on February 28 to commemorate the discovery of the Raman Effect by Indian physicist Sir C.V. Raman on this date in 1928. The Raman Effect describes the inelastic scattering of light when photons interact with molecules, causing a shift in wavelength. This groundbreaking discovery earned Raman the Nobel Prize in Physics in 1930—making him the first Asian to receive a Nobel Prize in any science category.

How: The day is celebrated with scientific exhibitions, lectures, competitions, laboratory open houses, and awards for outstanding contributions to science across India. The National Council for Science and Technology Communication (NCSTC) coordinates nationwide activities under annual themes promoting scientific temper, innovation, and STEM (Science, Technology, Engineering, Mathematics) education. The theme for 2025 emphasizes indigenous knowledge systems and their integration with modern science.

Why: Promoting scientific temper is a fundamental duty under Article 51A(h) of the Indian Constitution. UPSC tests C.V. Raman’s contributions, the Raman Effect and its applications (spectroscopy, materials analysis, medical diagnostics), National Science Day significance, and government initiatives for science popularization in Prelims (Science, Culture) and Mains (GS3 – Science & Technology, GS4 – Scientific Temper). Questions on Indian scientists’ contributions to global science and science communication appear regularly.

What: Hyperloop is a proposed ultra-high-speed ground transportation system capable of achieving speeds up to 1,200 km/h (750 mph) using magnetic levitation (maglev) technology inside low-pressure vacuum tubes. Passenger or cargo pods travel through near-vacuum tubes, eliminating air resistance and enabling unprecedented speeds with minimal energy consumption. The concept, popularized by entrepreneur Elon Musk in 2013, represents a potential revolution in intercity transport.

How: The system uses electromagnetic suspension to levitate pods above the track, eliminating friction. Tubes are maintained at very low pressure (near-vacuum), reducing air drag by 99%. Linear induction motors or electromagnetic propulsion accelerate pods to high speeds. Pods travel in platoons with computer-controlled spacing for safety. Proposed routes in India include Mumbai-Pune (being studied), Delhi-Chandigarh, and Bengaluru-Chennai, potentially reducing travel times by 70-80% compared to conventional trains.

Why: Future mobility solutions and disruptive technologies are relevant for India’s infrastructure modernization goals. UPSC tests emerging transportation technologies, maglev systems, infrastructure innovation, and comparative analysis of transport modes (cost, speed, energy efficiency, environmental impact) in Prelims (Science & Technology) and Mains (GS3 – Infrastructure, Innovation). Questions on feasibility, safety concerns, and regulatory frameworks for new technologies appear in both preliminary and main examinations.

What: The Ministry of Electronics and Information Technology (MeitY) launched the Aadhaar Good Governance Portal to streamline and digitize the approval process for Aadhaar authentication usage by various government departments, public sector undertakings, and authorized private entities. The portal creates a transparent, accountable framework for granting permissions to use Aadhaar-based authentication while ensuring compliance with the Aadhaar Act, 2016 and Supreme Court guidelines on privacy and data protection.

How: Entities seeking to use Aadhaar authentication for service delivery submit applications through the centralized portal, which tracks requests, conducts technical and legal evaluations, ensures purpose limitation compliance, and grants time-bound approvals. The system maintains audit trails, monitors usage patterns to prevent misuse, and provides a dashboard for oversight by the Unique Identification Authority of India (UIDAI). This replaces the earlier fragmented approval process and enhances governance transparency.

Why: Digital identity infrastructure and its governance are critical for service delivery and privacy protection. UPSC tests Aadhaar ecosystem, UIDAI’s role, authentication vs. e-KYC mechanisms, Supreme Court’s Puttaswamy judgment on privacy (2017), Aadhaar Act provisions, and data protection frameworks in Prelims (Polity, Digital Governance) and Mains (GS2 – Governance, GS3 – Technology). Questions on balancing digital inclusion with privacy rights, voluntary vs. mandatory Aadhaar, and regulatory oversight are common.

What: Go Digit General Insurance launched India’s first Air Quality Index (AQI)-based parametric insurance product for workers in Delhi-NCR. Unlike traditional indemnity insurance that compensates actual losses, parametric insurance triggers automatic payouts when pre-defined parameters (here, AQI levels) cross specified thresholds, regardless of actual health impact. This innovative product addresses health risks from air pollution exposure, particularly for outdoor workers, gig economy workers, and vulnerable populations.

How: The policy links payouts to official AQI readings from government monitoring stations. When AQI exceeds dangerous levels (e.g., 300+ for “very poor” or 400+ for “severe” categories) for consecutive days, insured workers automatically receive compensation for potential health impacts, income loss from reduced work hours, or medical expenses. The product uses real-time pollution data from Central Pollution Control Board (CPCB) monitoring networks, blockchain-based smart contracts for instant claim settlement, and eliminates lengthy claim verification processes.

Why: Climate risk finance and innovative insurance products addressing environmental health impacts represent emerging areas in both governance and environmental policy. UPSC tests air pollution management, AQI classification, National Clean Air Programme (NCAP), parametric vs. traditional insurance, climate adaptation finance, and social protection mechanisms in Prelims (Environment, Economy) and Mains (GS3 – Environment, Disaster Management). Questions linking pollution to public health economics and innovative risk transfer mechanisms are increasingly relevant.

What: Zydus Lifesciences launched VaxiFlu-4, India’s first indigenously developed quadrivalent influenza vaccine. Unlike trivalent vaccines that protect against three influenza strains (two Influenza A subtypes and one Influenza B lineage), quadrivalent vaccines cover four strains—adding protection against both Influenza B lineages (Victoria and Yamagata). This advancement provides broader protection during flu seasons when multiple strains circulate simultaneously.

How: VaxiFlu-4 is produced using advanced cell-culture technology rather than traditional egg-based methods, offering advantages like faster production, higher purity, and suitability for people with egg allergies. The vaccine contains inactivated (killed) virus antigens from four WHO-recommended influenza strains for the current season. It stimulates antibody production without causing infection. The indigenous development reduces import dependency, lowers costs, and ensures vaccine security during pandemics when global supply chains face disruptions.

Why: Vaccine development and pharmaceutical self-reliance are critical for public health security and Atmanirbhar Bharat objectives. UPSC tests vaccine technology platforms (mRNA, viral vector, inactivated, live attenuated), India’s vaccine production capacity, drug pricing regulations, pandemic preparedness, and pharmaceutical sector policies in Prelims (Science & Technology, Health) and Mains (GS3 – Health, Biotechnology). Questions on vaccine equity, indigenous R&D capabilities, and technology transfer appear regularly.

What: Yes Bank ranked as India’s top bank in S&P Global Sustainability Rankings 2025, demonstrating leadership in Environmental, Social, and Governance (ESG) performance among Indian financial institutions. The assessment evaluates banks across dimensions including climate risk management, green financing portfolios, renewable energy project funding, corporate governance standards, stakeholder engagement, and alignment with global sustainability frameworks like the UN Sustainable Development Goals (SDGs) and Paris Agreement.

How: Yes Bank’s sustainability leadership includes significant green bond issuances for financing renewable energy and clean infrastructure projects, implementation of the Equator Principles for environmental risk assessment in project finance, integration of ESG criteria in lending decisions, carbon-neutral operational commitments, transparent sustainability reporting following GRI (Global Reporting Initiative) standards, and dedicated sustainable finance targets. The bank pioneered sustainable banking in India with specific green lending portfolios and impact measurement frameworks.

Why: Sustainable finance and ESG integration in banking are becoming critical for capital allocation and risk management. UPSC tests green bonds, sustainable finance frameworks, RBI guidelines on climate risk disclosure, ESG reporting standards, responsible banking principles, and the role of finance in achieving climate goals in Prelims (Economy, Environment) and Mains (GS3 – Banking Sector, Climate Finance). Questions on greenwashing prevention, ESG rating methodologies, and linking finance with environmental outcomes are increasingly common.