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The rocky and siliceous non-metallic impurities associated with an ore are collectively called
Aflux
Bslag
Cgangue
Dmatte
Answer & Solution
Correct answer: C. gangue
1. Ores are mixed with earthy, rocky and siliceous impurities.
2. These undesired impurities are collectively called **gangue** (or matrix).
3. A **flux** later combines with the gangue to form a fusible **slag**; **matte** is a mixture of $Cu_2S$/$FeS$.
_Source: Samacheer Kalvi Class 12 Chemistry Vol.1, Unit 1 'Metallurgy', §1.2_
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