CBSE Class 12 Chemistry Revision Notes for General Principles and Processes of Isolation of Elements is discussed here. Metallurgy is the technological and scientific process which is used to isolate metal from its ore. Three steps involved in the metal extraction process are Concentration of Ore, Isolation of metal from concentrated Ore, and Purification of the metal.
The following steps help to isolate the crude metal from extracted ore.
Step 1: Conversion to oxides
Step 2: Reduction of oxides to metals
- Reduction by hydrogen
- Reduction by aluminium
- Auto reduction
- Reduction by Mg
Frequently asked Questions on CBSE Class 12 Chemistry Notes Chapter 6: General Principles and Processes of Isolation of Elements
What is ‘Calcination’?
The heating of solids to a high temperature for the purpose of removing volatile substances, oxidizing a portion of mass, or rendering them friable is called as ‘Calcination’.
What is ‘Smelting’?
Smelting is a form of extractive metallurgy to produce a metal from its ore. Smelting uses heat and a chemical reducing agent to decompose the ore.
What is ‘Auto Reduction’?
When sulphide ores of less electropositive metals are heated in air