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How many faraday of electricity are requ...

How many faraday of electricity are required to produce 18 g of Al (atomic mass = 27) from molten `Al_(2)O_(3)` by electrolysis -

A

`(3)/(2)`

B

`(2)/(3)`

C

2

D

`(3)/(17)`

Text Solution

Verified by Experts

The reaction `(Al_(2)O_(3)rarrAl)` is `Al^(3+)+3erarrAl`
`therefore" 27g Al formation required 3 F of electricity"`
`"18 g Al formation required "(3)/(27)xx18=2F`
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