alleryA substance added to an ore to lower the fusion temperature and combine with the gangue is called a:
ASlag
BFlux
CMatte
DMatrix
Answer & Solution
Correct answer: B. Flux
1. The rocky impurity in an ore is the gangue or matrix.
2. A flux is added to lower the fusion temperature and react with the gangue.
3. The fusible product of flux plus gangue is the slag.
So the substance added is the flux, while slag is the product formed.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Terminology in Metallurgy", p.119_
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