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JEE Mains · Chemistry · STD 12 - 2. Electrochemistry

सेल \(\mathrm{Pt}_{(\mathrm{s})}|\mathrm{H}(\mathrm{g}, 1 \mathrm{~atm})| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M}) \mid \) \( \left|\mathrm{Fe}^{3+}(\mathrm{aq}), \mathrm{Fe}^{2+}(\mathrm{aq})\right| \mathrm{Pt}(\mathrm{s})\) पर विचार कीजिये- दिया है \(\mathrm{Fe}^{3+}+\mathrm{e}^{-}=\mathrm{Fe}^{2+}, \mathrm{E}^{\circ} \mathrm{Fe}^{3+}, \mathrm{Fe}^{2+} \mid \mathrm{Pt}=0.771\) \(\frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{~V}\) जब सेल का विभव \(298 \mathrm{~K}\) पर \(0.712 \mathrm{~V}\) है तो \(\left[\mathrm{Fe}^{2+}\right] /\left[\mathrm{Fe}^{3+}\right]\) का अनुपात है (निकटतम पूर्णाक में)

  1. A \(30\)
  2. B \(10\)
  3. C \(20\)
  4. D \(50\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(10\)

Step-by-step Solution

Detailed explanation

\(Pt _{( s )}\left| H _2( g , 1 atm )\right| H ^{+}( aq , 1 M ) \| Fe ^{3+}( aq ), Fe ^{2+}( aq )| Pt |( s )\) \(\text { at anode } H _2 \longrightarrow 2 H ^{+}+2 e ^{-}\) \(\text {At cathode } Fe _{ aq }^{3+}+ e ^{-} \longrightarrow Fe _{ aq }^{2+}\)…
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