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Standard XII
Chemistry
Sandmeyer Reaction
Role of conce...
Question
Role of concentrated sodium hydroxide in leaching of alumina from bauxite
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Solution
Dear student,
Bauxite is reacted with NaOH to form soluble sodium aluminate leaving the insoluble impurities behind.
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In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with
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Q.
The reagent used to leach alumina from bauxite in Bayer's process is:
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Describe the three steps involved in the leaching of bauxite to get pure alumina (equations not expected).
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Assertion :Alumina is leached from bauxite using caustic soda Reason: Leaching is used when ore alone but not gangue is soluble in a suitable solvent
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Complete the following statement using every given options.
During the extraction of aluminium..............
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d. Heating the aluminium ore with concentrated caustic soda.
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