$Al_2O_3$ is reduced by electrolysis at low potentials and high currents. If $4.0 \times 10^4$ amperes of current is passed through molten $Al_2O_3$ for $6$ hours,what mass of aluminium is produced? (Assume $100\%$ current efficiency,at. mass of $Al = 27 \ g \ mol^{-1}$).
- A$8.1 \times 10^4 \ g$
- B$2.4 \times 10^5 \ g$
- C$1.3 \times 10^4 \ g$
- D$9.0 \times 10^3 \ g$
Explore More
Similar Questions
If a current of $0.4 \ A$ is passed through acidic water for $30 \ minutes$,calculate the volume of hydrogen gas produced at $STP$ in liters.
Medium
View SolutionMatch the column :-Column $I$ (Reduction process) Column $II$ (Charge required) $(a)$ $1$ mol of $MnO_4^-$ to $Mn^{2+}$ $(p)$ $193000$ $C$ $(b)$ $1$ mole of $Cr_2O_7^{2-}$ to $Cr^{3+}$ $(q)$ $289500$ $C$ $(c)$ $1$ mole of $Sn^{4+}$ to $Sn^{2+}$ $(r)$ $482500$ $C$ $(d)$ $1$ mole of $Al^{3+}$ to $Al$ $(s)$ $579000$ $C$
| Column $I$ (Reduction process) | Column $II$ (Charge required) |
|---|---|
| $(a)$ $1$ mol of $MnO_4^-$ to $Mn^{2+}$ | $(p)$ $193000$ $C$ |
| $(b)$ $1$ mole of $Cr_2O_7^{2-}$ to $Cr^{3+}$ | $(q)$ $289500$ $C$ |
| $(c)$ $1$ mole of $Sn^{4+}$ to $Sn^{2+}$ | $(r)$ $482500$ $C$ |
| $(d)$ $1$ mole of $Al^{3+}$ to $Al$ | $(s)$ $579000$ $C$ |
Difficult
View Solution$96500 \ C$ of electric charge liberates how many grams of $Cu$ from $CuSO_4$ solution?
Medium
View SolutionHow many $Faradays$ are required to generate one gram atom of magnesium from $MgCl_2$?
Easy
View Solution$CuSO_4$ solution is electrolysed for $15 \ minutes$ to deposit $0.4725 \ g$ of copper at the cathode. The current in amperes required is (Faraday $= 96,500 \ C \ mol^{-1}$,atomic weight of copper $= 63$)
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo