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How much time is required to deposit 1xx...

How much time is required to deposit `1xx10^(-3)` cm thick layer of silver (density is 1.05 g `cm^(-3)` ) on a surface of area 100 `cm^2` by passing a current of 5 A through `AgNO_3` solution?

A

125 s

B

115 s

C

27.25 s

D

18.7 s

Text Solution

Verified by Experts

The correct Answer is:
D
Mass of Ag in coated layer
`=V xx d =1 xx 10^(-3) xx 100xx1.05=0.105 g`
`W=(1xxt xx Eq. wt.)/(1xx Eq. wt.)=(0.105xx96500)/(5xx108)=18.7 s`
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