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Redox Reactions
Electrochemical Series and Feasibility of Reactions
1 question from 1 paper, each with its answer.
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- years asked, 2017–2026
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- of Redox Reactions
- 3.33%
Concepts tested
- spontaneity from electrode potentials
All Questions
2022 1 question
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At 298 K, the standard electrode potentials of $Cu^{2+}/Cu$, $Zn^{2+}/Zn$, $Fe^{2+}/Fe$ and $Ag^+/Ag$ are 0.34 V, $-0.76$ V, $-0.44$ V and 0.80 V, respectively. On the basis of standard electrode potential, predict which of the following reaction can not occur?Standard reduction potentials: $E^\circ_{Zn^{2+}/Zn} < E^\circ_{Fe^{2+}/Fe} < E^\circ_{Cu^{2+}/Cu} Fe > Cu > Ag A more reactive metal (lower SRP) can displace a less reactive metal from its salt solution. $2CuSO_4(aq) + 2Ag(s) \rightarrow 2Cu(s) + Ag_2SO_4(aq)$ is not possible, as Ag is less reactive than Cu.