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प्रश्न
What is the role of flux in metallurgical processes?
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उत्तर
The ores, even after concentration, contain some gangue. To remove gangue, certain substances are mixed with concentrated ore which combine with the gangue to form a fusible material which is not soluble in molten metal. The substances used are called fluxes.
Fluxes are classified as:
(i) Acidic flux and
(ii) Basic flux. Acidic flux removes basic impurities while basic flux removes acidic impurities.
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संबंधित प्रश्न
Choose the correct answer from the options given below:
Aluminum powder is used in thermite welding because
A. It is a strong reducing agent
B. It is a strong oxidizing agent
C. It is corrosion resistant
D. It is a good conductor of heat
Name the process by which impure ore of aluminium gets purified by using the concentrated solution of an alkali.
What is rust? Give the equation for the formation of rust ?
Name an ore of zinc.
Give three ways in which the metal zinc differs from the non-metals carbon. At least one of the differences must be a chemical difference?
State the use of:
Mild steel,
Name an alloy of copper in electrical appliances or household vessels.
Complete the statement using every given option.
During the extraction of aluminium..............
Use of leaching during the concentration of ore.
Define the term : Mineral
Define the term : Ore
Define the term : Charge
Name one metal occurring as a : Carbonate ore
Give composition and uses of the following alloys. Mention the reason for its use.
Duralumin
Give composition and uses of the following alloys. Mention the reason for its use.
Bronze
Give the name and formula of an ore of zinc.:
Roasting of the ore
What is an alloy? An alloy usually has some property which makes it useful in a specific way.
What is the special property of: Duralumin
State the main components of the following alloy:
Brass
Name the following:
The ore of zinc containing its sulphide.
Name : The processes involved in Refining of ores
