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General Principles and Processes of Isolation of Elements

Bihar Board Class 12 · Chemistry · 35 past questions

Topic Occurrence and ores of metals 4 Concentration of ores 1 Electrolytic and cyanide extraction 0 Refining of metals 0 Roasting, calcination and smelting 0

Level Easy 0 Moderate 0

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

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