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Aluminium oxide may be electrolysed at 1000°C to furnishaluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500Coulombs). The cathode reaction is– Al3+ + 3e- → Al° To prepare 5.12 kg of aluminium metal by this method werequire
  • a)
    5.49 × 101 C of electricity
  • b)
    5.49 × 104 C of electricity
  • c)
    1.83 × 107 C of electricity
  • d)
    5.49 × 107 C of electricity
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Aluminium oxide may be electrolysed at 1000°C to furnishaluminium ...
1 mole of e– = 1F = 96500 C
27g of Al is deposited by 3 × 96500 C
5120 g of Al will be deposited by
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Aluminium oxide may be electrolysed at 1000°C to furnishaluminium ...
°C to produce aluminium metal. The process involves passing an electric current through a molten mixture of aluminium oxide and cryolite (a natural mineral). The cryolite acts as a solvent, lowering the melting point of the aluminium oxide and allowing it to conduct electricity.

At the cathode (negative electrode), aluminium ions are reduced to form aluminium metal:

Al3+ + 3e- → Al

At the anode (positive electrode), oxygen ions are oxidized to form oxygen gas:

2O2- → O2 + 4e-

The overall reaction is:

2Al2O3 → 4Al + 3O2

This process is used to produce large quantities of aluminium metal for use in various industries, such as aerospace, construction, and transportation. However, it is energy-intensive and produces a significant amount of greenhouse gas emissions, so efforts are being made to develop more sustainable methods of producing aluminium.
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Aluminium oxide may be electrolysed at 1000°C to furnishaluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500Coulombs). The cathode reaction is– Al3+ + 3e- → Al° To prepare 5.12 kg of aluminium metal by this method werequirea)5.49 × 101 C of electricityb)5.49 × 104 C of electricityc)1.83 × 107 C of electricityd)5.49 × 107 C of electricityCorrect answer is option 'D'. Can you explain this answer?
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Aluminium oxide may be electrolysed at 1000°C to furnishaluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500Coulombs). The cathode reaction is– Al3+ + 3e- → Al° To prepare 5.12 kg of aluminium metal by this method werequirea)5.49 × 101 C of electricityb)5.49 × 104 C of electricityc)1.83 × 107 C of electricityd)5.49 × 107 C of electricityCorrect answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Aluminium oxide may be electrolysed at 1000°C to furnishaluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500Coulombs). The cathode reaction is– Al3+ + 3e- → Al° To prepare 5.12 kg of aluminium metal by this method werequirea)5.49 × 101 C of electricityb)5.49 × 104 C of electricityc)1.83 × 107 C of electricityd)5.49 × 107 C of electricityCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Aluminium oxide may be electrolysed at 1000°C to furnishaluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500Coulombs). The cathode reaction is– Al3+ + 3e- → Al° To prepare 5.12 kg of aluminium metal by this method werequirea)5.49 × 101 C of electricityb)5.49 × 104 C of electricityc)1.83 × 107 C of electricityd)5.49 × 107 C of electricityCorrect answer is option 'D'. Can you explain this answer?.
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