Prelims does not decide your final rank — it is a screening gate. You must clear GS Paper I (200 marks, 100 questions) while also clearing a 33% qualifying cut-off on CSAT to be shortlisted for Mains. But the static-knowledge foundation you build here — Polity, History, Geography, Economy, Environment, Science & Tech — is not thrown away after Prelims: it is the base layer Mains GS I–III and even the interview build on.
Polity & Governance40 marks · 20%
18–22 questions — the single biggest GS1 block. Constitution, DPSPs, Union/State machinery and constitutional bodies recur almost verbatim from Laxmikanth-level detail every year.
History & Culture36 marks · 18%
16–20 questions spanning Ancient to Modern India plus Art & Culture. Freedom-struggle and heritage/culture questions are especially current-affairs-linked (anniversaries, UNESCO listings).
Economy30 marks · 15%
13–17 questions, heavily budget- and policy-linked. Static concepts (inflation, fiscal terms, banking) anchor scheme- and survey-based current questions.
Environment & Ecology24 marks · 12%
10–14 questions and rising each year. Species, protected areas and international conventions are the fastest-growing current-affairs overlap in the whole paper.
Geography24 marks · 12%
10–14 questions, map-heavy. Physical geography explains mechanisms; Indian and world geography supply the place-based facts UPSC loves to test as disaster/resource news pegs.
Science & Technology20 marks · 10%
8–12 questions, almost entirely current-affairs-driven (ISRO launches, defence platforms, biotech/health news) sitting on a compact static base.
Current affairs & static-GK application26 marks · 13%
The remaining ~13 questions apply that same static base to the last 12–18 months of news — Schemes, reports, indices, appointments. Built by daily reading, not a chapter list.
