Shristy Maurya Asked a Question
June 11, 2020 7:43 pmpts 30 pts
0) 4. In aluminum extraction by the Bayer's process, alumina is extracted from bauxite by sodium hydroxide at high temperature and pressures. Al,0, (s) +20H (aq)> 2Al, (aq) + H,O() Solid impurities such as Fe,O; and SiO, are removed and then Al(OH)4 is reprecipitated. Al(OH) Al,0, 2H,O(s)+20H (aq) In the industrial world: a carbon dioxide is added to precipitate the alumina D. temperature and pressure are dropped and the super- saturated solution is seeded Cboth (a) and (b) are practiced d .the water is evaporated. (IIT-JEE 1999) ciO TiO. + Fe,O..
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  • Dinesh khalmaniya Best Answer
    https://doubtnut.com/question-answer-chemistry/in-aluminium-extraction-by-bayer-process-alumina-is-extracted-from-bauxite-by-sodium-hydroxide-at-hi-23689900
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    Shristy Maurya
    In this link ans is (d)
  • Dinesh khalmaniya thankyou
    option C is correct
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  • Dinesh khalmaniya thankyou
    In original process the alkaline solution was cooled and treated with bubbling CO2​ to precipitate alumina. but the seeding of saturated solution by dropping the temperature and p...
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