IAS Study Materials
General Studies - Environment
Plastic Pollution
Plastic Pollution refers to the accumulation of plastic products in the environment to such…
Soil Pollution, Solid Waste, Hazardous Waste & E-Waste
Soil pollution refers to the addition of toxic substances (chemicals, salts, radioactive materials, pathogens) into soil, …
Radioactive Pollution: Ionizing & Non-Ionizing Radiation
Increase in natural radiation levels posing threat to life.Contamination by radioactive substances in solids, liquids, gases, or body tissues…
Acid Rain & Ocean Acidification
Acid rain refers to precipitation with a pH < 5.6 includes Rain, Snow, Fog, Mist...
Air Pollution
Addition of undesirable substances into the environment due to human activities.
Global Environmental Issues
Global environmental issues are large-scale environmental problems that affect multiple coun-tries or the entire planet,
Estuarine Ecosystem & Mangroves
Aquatic ecosystems are ecosystems where plants and animals live in water.
Wetland Ecosystem
Aquatic ecosystems are plant–animal communities occurring in water bodies.
Biomes
Biome:- Large ecological region defined by climate, vegetation, fauna, and soil. Climate (temperature + precipitation) determines biome boundaries.
Biogeochemical (Nutrient) Cycles
Movement of nutrients between biotic (living) and abiotic (air, water, soil) components. Nutrients are recycled, unlike energy, which is lost as heat.
Ecosystem – Structure, Function & Types
Ecosystem: Concept & Definition – An ecosystem is the basic structural and functional unit of ecology.
Ecology
Ecology comes from the Greek words oikos (home) and logos (study). In simple terms, it examines how living organisms interact with one another…
Environment & Ecosystem
Environment-Natural component where biotic (living) and abiotic (non-living) factors interact. Shapes the habitat and ecosystem of organisms.
General Studies - Geography
Karst Landforms
Karst topography is a landscape formed by the dissolution of soluble rocks such as Limestone, Dolomite, Gypsum
Arid Landforms
Arid landforms are distinct geological features created in dry, sparsely vegetated regions primarily by wind (aeolian)…
Glacial Landforms – Erosional & Depositional
A glacier is a moving mass of ice (a few meters per day) that acts as an agent of erosion, transportation, and deposition, and carries rock debris.
Fluvial Landforms
Fluvial landforms are created by running water (rivers). Rivers drain nearly 68% of Earth’s land surface….
Earth’s Layers: Internal Structure of the Earth
The Earth is composed of concentric layers with distinct physical and chemical properties.
Asteroids, Comets & Meteors
Asteroids are remnants of planetary formation that failed to form a planet due to Jupiter’s
strong gravitational pull
Planets of the Solar System
A planet is a celestial body that, revolves around a star (Sun), moves in an elliptical orbit, does not emit its own light
The Sun
Age: ~4.6 billion years, Diameter: ~1.39 million km, Surface Temperature: ~6000 °C , …
Solar System: Core Components
Sun: ~99.86% of the total mass of the solar system; source of energy via nuclear fusion.
Nuclear Disc Model (Neo-Laplacian Model)
The solar system formed from a rotating interstellar nebula (gas + dust). Explains Sun and planets formation together, unlike earlier encounter theories.
Galaxies: Spiral Galaxies, Elliptical Galaxies & Milky Way
A galaxy is a massive system of millions to billions of stars, along with gas and dust, held together by gravity. Galaxies are the basic building blocks of the universe.
Star Formation / Stellar Evolution
Nebula – A vast cloud of hydrogen, helium, and dust. Birthplace of stars. Collapse begins due to gravitational instability (often triggered by shock waves from su-pernovae).
Gravitational Waves, Doppler Shift & Cosmic Microwave Background
Doppler Shift (Redshift & Blueshift): Redshift/Blueshift = change in light wavelength as celestial objects move away or towards us.
The Universe, Big Bang Theory & Evolution of the Universe
The Universe: Definition – The Universe = all existing matter + energy + space.
It includes: Physical components: subatomic particles → stars → galaxies → superclusters
General Studies - Economy
Capital Market
The capital market is a market where long-term financial securities are traded.
Money Market
Money Market is the segment of the financial market where short-term (≤ 1 year) high liquid-ity instruments are traded.
Indian Financial System – Commercial Banking System
Accepting deposits for lending/investment, repayable on demand/otherwise, withdrawable by cheque, draft, or order.
Inflation
Sustained rise in the general price level of goods and services. Measured as a percentage change in a price index.
Reserve Bank of India (RBI)
India’s Central Bank, the Reserve Bank of India (RBI), was established on 1 April 1935 based on the recommendations of the….
Fiscal Policy 2
Government receipts show the various sources from which the government raises financial re-sources.
Fiscal Policy
Fiscal Policy, also called Budgetary Policy, refers to the government’s policy of taxation, public expenditure…
Government Budget
A government budget is a financial statement that shows how much money the government expects to earn…
Inclusive Growth
OECD:- Growth that is fairly distributed and creates opportunities for all.
Resource Mobilization
Resource mobilization: Identification, unlocking, and optimal use of resources for development. Focus: Right resource, right time, right price, right use.
NITI Aayog: Genesis, Objectives, Performance & Issues
Genesis of NITI Aayog – Established on 1 January 2015, replacing the Planning Commission. Aim: Bottom-up planning, Maximum Governance–Minimum Government.
Planning in India: Socialist Path & Planning Commission
After Independence, India chose a Socialist pattern of development within a Mixed Economy
framework. The private sector was allowed and encouraged in business and industry.
Economic Planning in India
Economic Planning is a systematic process where the government identifies economic problems, prioritizes them, sets targets, mobilizes resources, and implements policies to achieve development goals.
National Income Accounting (India)
A parliamentary system is a democratic structure where: The party with the majority in the legislature forms the government.
General Studies - Polity
Election Commission of India (ECI)
The Election Commission of India (ECI) is an independent constitutional body respon-sible for conducting elections in India
Attorney General of India (AGI)
Article 76 – Provides for the Attorney General of India. Highest Law Officer of India. Chief Legal Advisor to the Union Government
State Legislature
Covered under Part VI (Articles 168–212) of the Constitution. Article 168 -Constitution of State Legislature.
Chief Minister
The Chief Minister (CM) is the real executive head of the State and functions in a role analogous to
the Prime Minister at the Centre.
Governor
The Governor is the constitutional head of the State. Real executive power lies with the Council of Ministers, headed by the CM
Process of Law-Making in the Indian Parliament
Parliament is the supreme legislative body of India. It consists of President, Lok Sabha and Rajya Sabha.
Leader of the Opposition (LoP) in India
The Leader of Opposition (LoP) is a Member of Parliament who leads the largest opposition party …
Motions in Parliament
A motion is a formal proposal made by a Member of Parliament (MP) or a Minister to initiate discussion or take a decision on a matter of public importance.
Structure of the Indian Parliament
Structure of the Indian Parliament : Parliament consists of President + Lok Sabha + Rajya Sabha
Cabinet Committees
Cabinet Committees: Extra-constitutional bodies, Not mentioned in the Indian Constitution, Set up by the Prime Minister, Reduce the workload of the Union Cabinet,,Decisions are binding on the government.
Council of Ministers (CoM)
What is the Council of Ministers? The Council of Ministers is the highest executive decision-making body of the Union Government.
Prime Minister of India
India is described as a Prime Ministerial Government because real executive authority is con-centrated in the Prime Minister, while the President functions as the nominal head.
Vice President of India
Constitutional Position: 2nd-highest constitutional office after the President (Order of Precedence)
President of India
Constitutional Position: Article 52 → “There shall be a President of India.” Head of State and First Citizen of India.
Parliamentary Form of Government
A parliamentary system is a democratic structure where: The party with the majority in the legislature forms the government.
Federalism
FEDERALISM: Meaning-Federalism is a system where power is shared between a central government and regional units (states/provinces).
Borrowed Features of the Indian Constitution
UK (British Constitution) – Parliamentary system, Rule of Law, law-making procedure, single citizenship, …
Amendment of the Constitution
Study Materials General Studies – Polity Amendment of the Constitution Download 1. Meaning Amendment of the Constitution means adding, changing,
12 Schedules of the Indian Constitution
Basic Facts – Originally 8 Schedules (1950) → now 12 (after amendments), Schedules are lists/tables attached to the Constitution to organise details.
Juvenile Justice Board (JJB)
What is the Juvenile Justice Board?
A statutory body under the JJ Act, 2015, to handle cases of children in conflict with the law. Why It Matters?
55% of cases pending before JJBs …
Fundamental Rights [Part Iii (Art. 12–35)]
Features of fundamental rights, The six fundamental rights, Exceptions & special provisions, Other key articles, Significance of fundamental rights
Fundamental Duties
Constitutional Basis, List of Fundamental Duties (Article 51A), Features of Fundamental Duties, Importance of Fundamental Duties…
Directive Principles of State Policy (DPSP)
Basic Facts-Part IV of the Constitution, Articles 36–51, Aim: Establish a Welfare State & ensure Social + Economic Justice
Citizenship
Citizens are full members of the Indian State and enjoy all civil and political rights. Rights Available Only to Citizens. Protection against discrimination (Art. 15)
Basic Structure Doctrine
What is the Basic Structure Doctrine? The Basic Structure Doctrine says that Parliament can amend the Constitution, but cannot change its essential framework.
General Studies
Union and Its Territory (Articles 1–4)
The Constitution describes India, or Bharat, as a Union of States. The phrase indicates that Indian states do not enjoy independent sovereignty,
Salient Features of the Indian Constitution
Longest Written Constitution India’s Constitution is the most exhaustive written Constitution in
Preamble
The Preamble of the Indian Constitution embodies the nation’s core ideals, declaring India to be a Sovereign,
Making of the Constitution
The Constituent Assembly, established in 1946, was responsible for drafting the Indian Constitution and…
Historical Underpinnings
Important Dates 1600: The East India Company got the exclusive right of trading in India under
