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How long does it take to deposit 100 g o...

How long does it take to deposit 100 g of Al from an electrolytic cell containing `Al_(2)O_(3)` using a current of 125 ampere ?

A

95.30 min

B

143 min

C

47.65 min

D

10 min

Text Solution

Verified by Experts

The correct Answer is:
B
Equivalent mass of Al = `("Atomic mass")/("valency") = (27)/(3) = 9`
`W = (ixxtxxE)/(96500)`
`100 = (125 xx t xx 9)/(96500) implies t = 8577. 77` sec = 143 min .
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