02 September
Complete bilingual TNPSC notes on Metals and Non-Metals — reactivity series, ores and minerals, roasting and calcination, extraction of aluminium by the Hall-Heroult process, thermite reaction, corrosion and alloys. Includes 14 key points, detailed notes in English and Tamil, 5 practice MCQs with answers, memory tricks and previous year question patterns for TNPSC Group 1, 2, 2A, 4 and VAO.