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In metallurgical extraction of Al.
I. Cryolite and fluorspar are added to molten alumina.
II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.
III. Molten AlCl3 can be taken instead of molten alumina.
IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.
Select the correct statements.
  • a)
    All except III
  • b)
    All except II
  • c)
    I and II only
  • d)
    I and IV only
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In metallurgical extraction of Al.I. Cryolite and fluorspar are added...
Explanation:

Statement I is correct:
- Cryolite and fluorspar are added to molten alumina in the extraction of aluminum to lower the melting point and increase conductivity, making the process more efficient.

Statement II is incorrect:
- Aqueous solutions of Al3+ salts can be used as an electrolyte in the extraction of aluminum, although molten cryolite is preferred due to its lower melting point and better conductivity.

Statement III is incorrect:
- Molten AlCl3 is not typically used in the extraction of aluminum, as molten alumina in cryolite is the more common electrolyte in the Hall-Héroult process.

Statement IV is correct:
- Hall's process is indeed used for the beneficiation of low-grade red bauxite, where alumina is extracted from bauxite ore through electrolysis using a molten cryolite electrolyte.
Therefore, the correct answer is option 'A' (All except III).
Free Test
Community Answer
In metallurgical extraction of Al.I. Cryolite and fluorspar are added...
I. CaF2 (fluorspar) and Na3AlF6 (cryolite) reduce melting point of the mixture CaF2 improves electrical conductivity of the melting as compared to molten Al2O3.
II. Aqueous solution of Al3+ cannot be taken since H2 gas is formed in preference to Al.
III. Molten AlCl3 being covalent is poor conductor. It sublimes at melting point. Hence, cannot be taken.
IV. Hall's process is adopted for the extraction of Aluminium from bauxite.
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In metallurgical extraction of Al.I. Cryolite and fluorspar are added to molten alumina.II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.III. Molten AlCl3 can be taken instead of molten alumina.IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.Select the correct statements.a)All except IIIb)All except IIc)I and II onlyd)I and IV onlyCorrect answer is option 'A'. Can you explain this answer?
Question Description
In metallurgical extraction of Al.I. Cryolite and fluorspar are added to molten alumina.II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.III. Molten AlCl3 can be taken instead of molten alumina.IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.Select the correct statements.a)All except IIIb)All except IIc)I and II onlyd)I and IV onlyCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In metallurgical extraction of Al.I. Cryolite and fluorspar are added to molten alumina.II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.III. Molten AlCl3 can be taken instead of molten alumina.IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.Select the correct statements.a)All except IIIb)All except IIc)I and II onlyd)I and IV onlyCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In metallurgical extraction of Al.I. Cryolite and fluorspar are added to molten alumina.II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.III. Molten AlCl3 can be taken instead of molten alumina.IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.Select the correct statements.a)All except IIIb)All except IIc)I and II onlyd)I and IV onlyCorrect answer is option 'A'. Can you explain this answer?.
Solutions for In metallurgical extraction of Al.I. Cryolite and fluorspar are added to molten alumina.II. An aqueous solution of Al3+ salts cannot be taken as an electrolyte.III. Molten AlCl3 can be taken instead of molten alumina.IV. Hall's process is adopted for the beneficiation of low-grade red bauxite.Select the correct statements.a)All except IIIb)All except IIc)I and II onlyd)I and IV onlyCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
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