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JEE Mains · Chemistry · STD 12 - 2. Electrochemistry

निम्नलिखित अभिक्रिया की एक सेल मान लीजिए - \({Cu}_{({s})}+2 {Ag}^{+}\left(1 \times 10^{-3} \,{M}\right) \rightarrow {Cu}^{2+}(0.250\, {M})+2 {Ag}_{({s})}\) \({E}_{{Cell}}^{\ominus}=2.97\, {~V}\) उपरोक्त अभिक्रिया के लिए \(E _{\text {cell }}\).................\(V\)है। (निकटतम पूर्णाक में) [दिया है: \(\log 2.5=0.3979, T =298 K\) ]

  1. A \(5\)
  2. B \(2\)
  3. C \(3\)
  4. D \(9\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(3\)

Step-by-step Solution

Detailed explanation

\(\mathrm{E}=\mathrm{E}^{\circ}-\frac{0.059}{2} \log \frac{\left[\mathrm{Cu}^{+2}\right]}{\left[\mathrm{Ag}^{+}\right]^{2}}\) \(=2.97-\frac{0.059}{2} \log \frac{0.25}{\left(10^{-3}\right)^{2}}=2.81\,\mathrm{~V}\)
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