Aluminium oxide may be electorlysed at `1000^@C` to furnish aluminim metal (Atomic Mass `= 27 ` amu, `1 F = 96, 500 C)`. The cathode reaction is
`Al^3 + 3d^(-) rarr Al^@`
To prepare ` 5.12 kg` of aluminimu metal by this method woold require .

Options

A. ` 5. 49 xx 10^4 C` electricity
B. `1. 83 xx 10^7 C` of elctricity
C. ` 5. 94 xx 10^7 C` of electricity
D. ` 5 . 49 xx 10^1 C` of electricity

Answer

C

Explanation

` 27 g ` of Al is obtained by passing a current of `3xx96500 C`.
`:. 1 g ` og Al is obtained by passing a current of ` 3xx(96500)/(27) xx 4 . 12 xx 1000`
`= 1.83 xx 10^7 Cxx 3= 5.49 xx 10^7 C`.