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JEE Mains · Chemistry · STD 12 - 2. Electrochemistry

\(300\, K\) એ એક કોષનો પ્રમાણિત ઇલેક્ટ્રોડ પોટેન્શિયલ (વિભવ) \(2\, V\) છે. \(300\, K\) એ આપેલ પ્રક્રિયા માટે અંદાજીત સંતુલન અચળાંક \((K)\) કેટલો હશે? \(Zn\,(s)\,\, + \,\,C{u^{2 + }}\,(aq)\, \rightleftharpoons \,Z{n^{2 + \,}}\,(aq)\, + Cu\,(s)\) \((R = 8 \,JK^{-1}\,mol^{-1},\, F = 96000\,C\,mol^{-1})\)

  1. A \(e^{-80}\)
  2. B \(e^{-160}\)
  3. C \(e^{320}\)
  4. D \(e^{160}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(e^{160}\)

Step-by-step Solution

Detailed explanation

\(Zn\,(S)\, + \,C{u^{2 + }}(aq)\, \rightleftharpoons \,Z{n^{2 + }}\,(aq)\, + \,Cu(s)\) \( - nF{E_{cell}}\, = \, - \,RT\ln \,K\) \(\ln \,K\, = \,\frac{{2\, \times \,96500\, \times \,2}}{{8\, \times \,300}}\, = \,160.83\) \(K\, = \,{e^{160}}\)
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