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प्रश्न
What is the role of flux in metallurgical processes?
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उत्तर
The ores, even after concentration, contain some gangue. To remove gangue, certain substances are mixed with concentrated ore which combine with the gangue to form a fusible material which is not soluble in molten metal. The substances used are called fluxes.
Fluxes are classified as:
(i) Acidic flux and
(ii) Basic flux. Acidic flux removes basic impurities while basic flux removes acidic impurities.
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संबंधित प्रश्न
Explain and give reasons why aluminium vessels should not be cleaned with powders containing alkalis ?
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forth floatation process
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Zinc is used to cover iron so as to prevent rusting of iron. Why?
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which:
for not react with cold water but reacts with steam when heated.
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| Group A | Group B |
| a. Bauxite | i. Mercury |
| b. Cassiterite | ii. Aluminium |
| c. Cinnabar | iii. Tin |
Name the following:
The rocky impurities present in an ore.
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(a) Based on densities
(b) Based on magnetic nature.
Name one metal occurring as a : Halide ore
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Stainless steel
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Stainless steel is more useful than steel.
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Define and explain the meaning of the term ore.
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- Coke
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- Sodium hydroxide solution
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Write the formula of cryolite.
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Explain concept with example/explain with the help of a balanced equation.
Ores
