SATHEE: Redox Reactions And Electrochemistry Ques 575

Redox Reactions And Electrochemistry Ques 575

Question: Aluminium oxide may be electrolysed at $1000^{\circ} C$ to furnish aluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is - $A l^{3 +} + 3 e^{-} \to A l$ To prepare 5.12 kg of aluminium metal by this method we require electricity of

Options:

A) $5.49 \times 10^{1} C$

B) $5.49 \times 10^{4} C$

C) $1.83 \times 10^{7} C$

D) $5.49 \times 10^{7} C$

Show Answer

Answer:

Correct Answer: D

Solution:

[d] 1 mole of $e^{-} = 1 F = 96500 C$ 27g of Al is deposited by $3 \times 96500 C$ 5120 g of Al will be deposited by $= \frac{3 \times 96500 \times 5120}{27} = 5.49 \times 10^{7} C$

Redox Reactions And Electrochemistry Ques 575

Question: Aluminium oxide may be electrolysed at $1000^{\circ} C$ to furnish aluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is - $A l^{3 +} + 3 e^{-} \to A l$ To prepare 5.12 kg of aluminium metal by this method we require electricity of

Options:

Answer:

Solution:

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Redox Reactions And Electrochemistry Ques 575

Question: Aluminium oxide may be electrolysed at 1000∘C to furnish aluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is - Al3++3e−→Al To prepare 5.12 kg of aluminium metal by this method we require electricity of

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: Aluminium oxide may be electrolysed at $1000^{\circ} C$ to furnish aluminium metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is - $A l^{3 +} + 3 e^{-} \to A l$ To prepare 5.12 kg of aluminium metal by this method we require electricity of