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Isolation of Elements question

2020 · Shift 2 · Q9
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Isolation of Elements question

2020 · Shift 2 · Q9

JEE AdvancedChemistryIsolation of ElementsMultiple correct+4 / −2
Which among the following statement(s) is/are true for the extraction of aluminium from bauxite?
  1. A
    Hydrated Al2O3Al_2O_3Al2​O3​ precipitates, when CO2CO_2CO2​ is bubbled through a solution of sodium aluminate.
  2. B
    Addition of Na3AlF6Na_3AlF_6Na3​AlF6​ lowers the melting point of alumina.
  3. C
    CO2CO_2CO2​ is evolved at the anode during electrolysis.
  4. D
    The cathode is a steel vessel with a lining or carbon.
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