Indian Forest Service (Mains), Chemistry optional · 2024 · Paper I
Q2(d). Ordering metal reduction potentials
Question
A metal M₁ can displace hydrogen but another metal M₂ cannot. Metal M₂ can displace another metal M₃ from its salt solution. Arrange M₁, M₂, M₃ in decreasing order of their E° values. Justify.
Answer in brief
For standard reduction potentials, the order is E°(M₃) > E°(M₂) > E°(M₁).
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Coverselectrochemical seriesstandard reduction potentialdisplacement reactionhydrogen displacementmetal activity series
All parts of Question 2
- 2(a) Most probable radius in Li²⁺10 marks
- 2(b) Equilibrium vacancy concentration15 marks
- 2(c) Arrhenius parameters from a logarithmic law10 marks
- 2(d) Ordering metal reduction potentials5 marks