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On the bassis of the information availab...

On the bassis of the information available from the reaction ` 4/3 Al + O_2 rarr 2/3 Al_2 O_3 . Delta G =- 82 7 k J "mol"^(-1)` of `O_2` the minimum emf required to carry out an electorlysis of `Al_2 O_3` is `(F= 96500 C "mol"^(-1))`

A

` 8.56 V`

B

` 2.14 V`

C

` 4.` 28 V`

D

` 6. 42 V`

Text Solution

Verified by Experts

The correct Answer is:
B
`V= (82 7 xx 10^3)/( 4 xx 96500) = 2.14 V`
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