(A) The cathode reaction is $Al^{3+} + 3e^- \to Al^0$.This shows that $1 \, \text{mole}$ of $Al$ $(27 \, g)$ requires $3 \, \text{Faradays}$ of charge

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$5.49 \times 10^7 \, C$ of electricity

(A) The cathode reaction is $Al^{3+} + 3e^- \to Al^0$.This shows that $1 \, \text{mole}$ of $Al$ $(27 \, g)$ requires $3 \, \text{Faradays}$ of charge.Charge required for $27 \, g$ of $Al = 3 \times 96,500 \, C = 289,500 \, C$.Mass of $Al$ to be prepared $= 5.12 \, kg = 5,120 \, g$.Charge required for $5,120 \, g$ of $Al = \frac{289,500 \, C}{27 \, g} \times 5,120 \, g$.$= 10,722.22 \times 5,120 \, C \approx 5.49 \times 10^7 \, C$.

Class 12 Chemistry Electrochemistry Faraday’s law of electrolysis

Difficult

Aluminium oxide may be electrolysed at $1000 \, ^\circ C$ to furnish aluminium metal (At. Mass $= 27 \, amu$; $1 \, F = 96,500 \, C$). The cathode reaction is $Al^{3+} + 3e^- \to Al^0$. To prepare $5.12 \, kg$ of aluminium metal by this method would require:

AIEEE 2005 All AIEEE

A
$5.49 \times 10^7 \, C$ of electricity
B
$1.83 \times 10^7 \, C$ of electricity
C
$5.49 \times 10^4 \, C$ of electricity
D
$5.49 \times 10^1 \, C$ of electricity

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Chemistry Questions

Chapter

Electrochemistry

Subtopic

Faraday’s law of electrolysis

Previous Year

AIEEE 2005 Paper All AIEEE years →

Consider the following reaction:
$MnO_4^- + 8H^{+} + 5e^- \rightarrow Mn^{2+} + 4H_2O$,$E^\circ = 1.51 \ V$
The quantity of electricity required in Faraday to reduce five moles of $MnO_4^-$ is ..... .

MediumJEE MAIN 2021

View Solution

An electrolytic cell contains a solution of $Ag_{2}SO_{4}$ and has platinum electrodes. $A$ current is passed until $1.6 \ g$ of $O_{2}$ is liberated at the anode. The amount of silver deposited at the cathode would be ............ $g$.

Medium

View Solution

What is the charge on tin if $7.375 \ g$ of metallic tin is deposited by the passage of $24125 \ C$ through a solution containing the ion? [Atomic weight of $Sn = 118 \ g/mol$]

Medium

View Solution

$A$ dilute solution of sulphuric acid is electrolysed using a current of $0.10 \ A$ for $2 \ hours$ to produce hydrogen and oxygen gas. The total volume of gases produced at $STP$ is $...... \ cm^3$. (Nearest integer) $[$ Given : Faraday constant $F = 96500 \ C \ mol^{-1}$ at $STP$,molar volume of an ideal gas is $22.7 \ L \ mol^{-1} ]$

DifficultJEE MAIN 2022

View Solution

$10 \, A$ current is passed through $CuSO_4$ solution for $193 \, \text{minutes}$ at $1 \, \text{bar}$ pressure and $300 \, K$ temperature. If the cell has $80 \%$ efficiency,find the weight of $Cu$ deposited and the volume of $O_2$ evolved. $[Cu = 63.5 \, u, R = 0.08314 \, \text{L bar K}^{-1} \text{mol}^{-1}]$

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Aluminium oxide may be electrolysed at $1000 \, ^\circ C$ to furnish aluminium metal (At. Mass $= 27 \, amu$; $1 \, F = 96,500 \, C$). The cathode reaction is $Al^{3+} + 3e^- \to Al^0$. To prepare $5.12 \, kg$ of aluminium metal by this method would require:

Similar Questions

Consider the following reaction:$MnO_4^- + 8H^{+} + 5e^- \rightarrow Mn^{2+} + 4H_2O$,$E^\circ = 1.51 \ V$The quantity of electricity required in Faraday to reduce five moles of $MnO_4^-$ is ..... .

An electrolytic cell contains a solution of $Ag_{2}SO_{4}$ and has platinum electrodes. $A$ current is passed until $1.6 \ g$ of $O_{2}$ is liberated at the anode. The amount of silver deposited at the cathode would be ............ $g$.

What is the charge on tin if $7.375 \ g$ of metallic tin is deposited by the passage of $24125 \ C$ through a solution containing the ion? [Atomic weight of $Sn = 118 \ g/mol$]

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Consider the following reaction:
$MnO_4^- + 8H^{+} + 5e^- \rightarrow Mn^{2+} + 4H_2O$,$E^\circ = 1.51 \ V$
The quantity of electricity required in Faraday to reduce five moles of $MnO_4^-$ is ..... .