Question

Describe Extraction of metal which is found in the liquid form

Answer 1

The process of extracting a metal in pure form from its ore is known as metallurgy. The process of treatment depends on upon the nature of the ore, impurities, and the metal.

From the extraction point of view, the metals can be broadly classified into five categories.

Category I :Highly electropositive metals such as alkali metals are extracted by the electrolytic method from their molten/fused salts.

Category II :Electropositive metals such as alkaline earth metals are extracted by electrolytic method form their molten salt.

Category III : Reactive metals of high valency are extracted by reduction and electrolytic method.

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Grade 11  ChemistryMetal And Metallurgical PrinciplesExtraction Of Metals: Metallurgy

Note on Extraction Of Metals: Metallurgy

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Note 

Things to remember

The process of extracting a metal in pure form from its ore is known as metallurgy. The process of treatment depends on upon the nature of the ore, impurities, and the metal.

From the extraction point of view, the metals can be broadly classified into five categories.

Category I :Highly electropositive metals such as alkali metals are extracted by the electrolytic method from their molten/fused salts.

Category II :Electropositive metals such as alkaline earth metals are extracted by electrolytic method form their molten salt.

Category III : Reactive metals of high valency are extracted by reduction and electrolytic method.

Catagory IV :Heavy metals such as Fe, Co, Ni , Cu , etc . are extracted by roasting and reduction methods.

Catagory V :Less reactive metals such as Ag, Au, Pt, etc. are extracted by amalgamation or cyanide process.

The various process involved in the extraction of pure metals from their ores are :

Concentration or Benefaction of the oreExtraction of crude metal from the concentrated oreRefining of the crude metal.


A. Concentration or Benefaction of the Ore

This is a very important in metallurgy. The ore is obtained from the earth and usually contain dust, stone, quartz, feldspar and other foreign materials.These impurities are known as gangue or matrix. The process of separation of gangue from ore is known as concentration. The important process of concentration is discussed below .

Answer 2

Metals:- Materials that have lustre, hard and can be beaten to sheets.