Q.

Calculate the time required to deposite 2 x 10-3 cm thick layer of silver (density 1.05 g cm-3) on the surface of area 1 00 cm-3 by passing a current of 10 A through silver nitrate solution?

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125 s

115 s

18.7 s

27.25 s

answer is C.

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Detailed Solution

Mass of silver in coating =V x d =2×10−3×100×1.05=2×0.105g w=I×t×E96500or t=w×96500I×E=0.105×2×9650010×108=18.7s

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