Extraction of Aluminium, Aluminium Ore, Concentration of Ore (For CBSE, ICSE, IAS, NET, NRA 2022)

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Aluminium Uses

The list of uses of aluminium is given below.

  • Aluminium is used in a wide range of applications in the field of transport, construction, etc.
  • Aluminium foils are used in the food industries for wrapping food.
  • The dust of this metal is used in paints.
  • It is used in the extraction of manganese and chromium from its oxides.
  • As it is a soft metal and it can be moulded into any shape it is used in the manufacturing of storage cans.
  • Aluminium after iron is the most commonly used metal.
  • It is mostly used with another metal in an alloy, meaning that it is blended with another metal to create another compound with some desirable characteristics-like stainless steel.

Questions

How Aluminium is Extracted from Its Ore?

Answer: Bauxite is also aluminum ore. To obtain aluminum oxide, bauxite is purified, a white powder form in which aluminum can be extracted. Electrolysis is used for extraction.

Why is Aluminium Extracted from Alumina?

Answer: Aluminum is more reactive than carbon and has more oxygen affinity, so aluminum cannot be reduced by burning, but is removed by electrolytic reduction.

What is Aluminum Used For?

Answer: Aluminum is a lightweight, silver-white metal. It՚s gentle, malevolent. In a wide variety of products, aluminum is used from bottles, foils, kitchen utensils, window frames, beer kegs and parts of the aircraft.

What Are the Properties of Aluminium?

Answer: Pure aluminum has high electrical conductivity and is flexible, ductile, corrosion-resistant. Aluminum is being used in an ever-increasing number of applications by using various combinations of its advantageous properties such as strength, lightness, corrosion resistance, recyclability, and formability.

What Are the Types of Aluminium?

Answer: There are two main classifications, casting alloys and wrought alloys, both further subdivided into the heat-treatable and non-heat-treatable categories. Approximately 85 % of aluminum is used for wrought items, such as rolled metal, foils and extrusions.

Why is Aluminium Extracted by Electrolysis?

Answer:

Aluminium is more reactive than carbon so it must be extracted from its compounds using electrolysis. Even though aluminium is more abundant than iron in the Earth՚s crust, aluminium is more expensive than iron. This is mainly because of the large amounts of electrical energy used in the extraction process.

How is Raw Aluminium Extracted?

Answer:

Aluminium is obtained by the electrolysis of alumina which extracts pure aluminium metal from alumina. Alumina, or aluminium oxide, is extracted from the bauxite through refining. Alumina is separated from the bauxite by using a hot solution of caustic soda and lime.

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