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Assertion: Bauxite is the primary ore for the extraction of alumina.
Reasoning: Bauxite is a mixture of various hydrated aluminium oxides, such as gibbsite, boehmite, and diaspore, which can be processed to obtain alumina.
Both the assertion and reasoning are true, and the reasoning is the correct explanation of the assertion.
Both the assertion and reasoning are true, but the reasoning is not the correct explanation of the assertion.
The assertion is true, but the reasoning is false.
Both the assertion and reasoning are false.
Answers (1)
The assertion states that bauxite is the primary ore for the extraction of alumina, and the reasoning provides an explanation for this statement.
Bauxite is indeed the primary ore used for the extraction of alumina. Bauxite is a mixture of various hydrated aluminium oxides, including gibbsite , boehmite
, and diaspore
. These minerals are the main sources of aluminium in bauxite deposits.
To obtain alumina from bauxite, a process called the Bayer process is commonly used. In this process, bauxite is first crushed and then treated with a sodium hydroxide solution. This treatment dissolves the aluminium hydroxide minerals present in bauxite, leaving behind impurities. The resulting solution is then filtered to remove the insoluble impurities.
The filtrate, containing dissolved aluminium hydroxide, is further processed to obtain alumina. It is subjected to precipitation and calcination steps, where the aluminium hydroxide is converted into alumina . The alumina obtained from bauxite is a key intermediate in the production of aluminium metal.
Therefore, bauxite is indeed the primary ore for the extraction of alumina, as it contains the necessary hydrated aluminium oxides that can be processed to obtain alumina.
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