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← Bihar Board Class 12 PYQ
General Principles and Processes of Isolation of Elements
Bihar Board Class 12 · Chemistry · 35 past questions
Topic
Occurrence and ores of metals
17
Electrolytic and cyanide extraction
6
Concentration of ores
5
Refining of metals
3
Roasting, calcination and smelting
2
Level
Easy
2
Moderate
0
Year
2026
0
2025
0
2024
0
2023
1
2022
0
2021
0
2019
1
2017
0
2016
0
2015
0
2 of 35 ·
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Q13
2023 Set F
The process of reduction of a metal oxide by carbon or carbon monoxide to the metal is called
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Q26
2019 Set D
A process of heating ore of a metal in excess of air below its melting point is called -
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