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General Principles and Processes of Isolation of Elements

Bihar Board Class 12 · Chemistry · 35 past questions

Topic Concentration of ores 1 Electrolytic and cyanide extraction 1 Refining of metals 1 Occurrence and ores of metals 0 Roasting, calcination and smelting 0

Level Easy 0 Moderate 0

Year 2026 1 2025 0 2024 1 2023 2 2022 1 2021 4 2019 1 2017 1 2016 2 2015 4

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