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Question

The time required to liberate one gram equivalent of an element by passing one ampere current through its solution is:

A
6.7 Hrs
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B
13.4 Hrs
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C
19.9 Hrs
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D
26.8 Hrs
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Solution

The correct option is C 26.8 Hrs
A Faraday is defined as amount of electric charge in one mole of electrons.
1F=96,500 coulombs

We know that : Q(C)=I(A)×t(s)
Where,
Q= charge =96,500C
I= current 1A
t= time

Putting the values in the formula :
t=96500(C)1(A)
=96500 s
=26.8 hrs

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