Important topics and their relevance in UPSC CSE exam for September 3, 2025. If you missed the September 2, 2025, UPSC CSE exam key from the Indian Express, read it here. Syllabus: Preliminary Examination: Current events of national and international importance Mains Examination: General Studies-III: Achievements of Indians in science & technology; indigenization of technology and developing new technology. Story continues below this ad What’s the ongoing story: Announcing that his government was working on the “next phase” of the India Semiconductor Mission, Prime Minister Narendra Modi on Tuesday said “the day is not far when India’s smallest chip will...