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Electrochemistry question

2011 · Q94
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Electrochemistry question

2011 · Q94

NEETChemistryElectrochemistryMCQ+4 / −1
Standard electrode potential for Sn4+/Sn2+ couple is + 0.15 V and that for the Cr3+/Cr couple is −-− 0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be
  1. A
    + 1.19 V
  2. B
    + 0.89 V
  3. C
    + 0.18 V
  4. D
    + 1.83 V
View written solutionFree

Correct answer: B

E°Sn4+/Sn2+ = 0.15 V

E°Cr3+/Cr = –0.74 V

E°cell = E°cathode – E°anode

= 0.15 – (– 0.74) = 0.15 + 0.74 = 0.89 V

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