Note on Introduction to Metals

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Minerals: Minerals are those naturally occurring substances earthen which containmetals in any amount.

Ores: Ores are those naturally occurring substances or minerals from which metals can be conveniently and economically extracted.

Metallurgy: Metallurgy is the complex and sequential process of extracting metals from their respective ores.

In this process, we have to cross following steps:

  1. Crushing of the ore
  2. Pulverization of the ore
  3. Concentration of the ore
  4. Calcination and roasting.
  5. Extraction of metal from calcinated or roasted ore
  6. Refining of impure metal.

  • Minerals are those naturally occurring substances earthen which contain metals in any amount.
  • Ores are those naturally occurring substances or minerals from which metals can be conveniently and economically extracted.
  • Metallurgy is the complex and sequential process of extracting metals from their respective ores.
  • Followings are the steps of metallurgy:
    • Crushing of the ore
    • Pulverization of the ore
    • Concentration of the ore
    • Calcination and roasting
    • Extraction of metal from calcinated or roasted ore
    • Refining of impure metal
.

Very Short Questions

The object which gives sharp sound but doesn't break down into pieces when hammered is a metal. The two examples of metal are Iron and Aluminum.

The two main properties of metal are:

i. Metals are ductile and malleable.
ii. Metals are good conductor of heat.

The two properties of metal by virtue by which, wire is made from it are: a. Metals are ductile and malleable. b. Metals are not broken when hammered.

The given metals are arranged in order of increasing melting point as follows: Silver < Gold < Copper < Iron.

Ores are defined as those naturally occurring substances or minerals from which metals can be conveniently and economically extracted.

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  • Washing soda is manufactured by the help of______.

    ammonia
    carbondioxide
    sodium chloride
    All the answers are correct
  • The complex and sequential process of extracting metals from their respective ores is ______.

    Refining of impure metal


    Metallurgy


    none of above


    mining


  • Which is the most reactive metal?

    iron


    potassium


    lead


    tin


  • Which one of the folowing is least reactive?

    sodium


    zinc


    calcium


    platinum


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Forum Time Replies Report

why is tungsten metal not used in heater?


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Bibek

What is required for the reaction between silver and and sodium nitrate..Plz ans.. fast


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