Chemistry - Electrochemistry Question with Solution | TestHub

ChemistryElectrochemistryGalvanic cells/Nernst Equation/Concentration CellsEasy2 minPYQ_2020

ChemistryEasysingle choice

How long a current of 3 amperes has to be passed through a solution of $A g N O_{3}$ to coat a metal surface of 80 $c m^{2}$ with a 0.005 mm thick layer. (Density of Ag is 10.5 g $c m^{- 3}$ ).

Options:

Answer:

Solution:

Weight of Ag deposited = Volume $\times$ density
$= (A r e a \times t h i c k n e s s) \times d e n s i t y$
$= 80 \times 5 \times 1 0^{- 11} \times 10.5 = 0.42$ g
$t = \frac{W \times F}{E \times i} = \frac{0.42 \times 96500}{108 \times 3} = 125.09$ sec.

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:ElectrochemistrySubtopic:Galvanic cells/Nernst Equation/Concentration Cells

⏱ 2mℹ️ Source: PYQ_2020

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