Metallurgy in one shot
Parth Momaya · YouTube
Concentration of ore, roasting versus calcination, reduction and refining — the whole extraction sequence in order.
Metallurgy
Chapter 8 of Science and Technology Part 1, SSC Std 10 (English Medium). A short revision read — free, no sign-up.
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Hand-picked free resources for this exact chapter.
The chapter condensed
New Indian Era · YouTube
A second take on the same material, with the reactivity series used as the spine of the explanation.
Full chapter, taught in detail
JR Tutorials · YouTube
The long version, useful if the properties of metals and non-metals have not stuck yet.