The time period to coat a metal surface of (80 ~cm ^2 ) with (5 10⁻³ ~cm ) thick layer of silver (density (1.05 ~g ~cm ⁻³ ) ) with the passage of (3 ~A ) current through a silver nitrate solution is

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Correct answer: B. (125 sec )

aligned & Weight of Ag required =V d & =80 5 10⁻³ 1.05=0.42 & W= Eit 96500 & 0.42= 108 3 t 96500 t=125 sec . aligned

The time period to coat a metal surface of (80 ~cm ^2 ) with (5 10⁻³ ~cm ) thick layer of silver (density (1.05 ~g ~cm ⁻³ ) ) with the passage of (3 ~A ) current through a silver nitrate solution is

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