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Chemistry / Metallurgy

Chemistry / Metallurgy

Elements can be classified as metals and non-metals.  

  •  Metals are lustrous, malleable, ductile and are good conductors of heat and electricity.
  •  They are solids at room temperature, except mercury which is a liquid.  
  •  Metals can form positive ions by losing electrons to non-metals.
  • The extraction of metals from their ores and then refining them for use is known as metallurgy
  • Steps involved in Extraction of metals from ore include dressing or ore, concentration , roasting and calcination and refining.
  • The surface of some metals, such as iron, is corroded when they are exposed to moist air for a long period of time. This phenomenon is known as corrosion. Corrosion can be prevented by barrier protection, sacrificial protection and cathode protection.
  • The arrangement of metals in decreasing order of their reactivity is called the activity or reactivity series of the metals.
  • All metals above hydrogen, in the activity series, reduce hydrogen ions from dilute acids and give out hydrogen.

More topics covered in this module are: Extraction of aluminium, uses of metals and alloys.

Exercises
Topics
Exercises
Topics
  • Metallurgy - SmartTest

    Metallurgy

    • Accessed by: 321 Students
    • Average Time: 00:04:25
    • Average Score: 56.55
    • Questions: 82
    • Introduction to Metallurgy
    • Classification and characteristics of different types of metals
    • Comparison of metals and non-metals
    • Activity Series of metals
    • Corrosion
    • Extraction and Refining of metals
    • Aluminium Extraction Process
    • Properties of Aluminium
    • Uses of Metals
    • Alloys
    • Review of Metallurgy

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