12 Questions
What is the purpose of roasting in the extraction of metals from sulphide ores?
To convert sulphides into oxides
In the process of calcination, what type of ores are changed into oxides by heating strongly in limited air?
Carbonate ores
Which method is commonly used for refining impure metals?
Electrolytic refining
In which state do good conductors of electricity conduct but not in the solid state?
Molten state
How can the rusting of iron be prevented according to the text?
Galvanizing
What is the term used for minerals that contain a very high percentage of a particular metal and can be profitably extracted from it?
Ores
Which method is commonly used for the extraction of metals with medium reactivity such as Al, Zn, and Fe from their ores?
Reduction using carbon
Which type of metal oxides react with both acids and bases to produce salts and water?
Amphoteric Oxides
What happens when metals like Sodium and Potassium react with water?
The reaction is violent, producing hydrogen that catches fire
What is the term used for impurities such as soil and sand present in ores?
Gangue
What happens when Aluminium and Iron react with water?
They react with steam, forming oxides
What occurs when a more reactive metal reacts with a solution of a less reactive metal salt?
The more reactive metal displaces the less reactive metal from the compound
Test your knowledge on metallurgy processes including roasting, calcination, reduction, and refining of metals. Learn about the conversion of sulphide ores to oxides, carbonate ores to oxides, metal oxides to metals, and the electrolytic refining method.
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