Redox Reactions And Electrochemistry Ques 665

Question: The standard reduction potentials at 298K for the following half reactions are given against each

$ Z{{n}^{2+}}(aq)+2e\rightarrow Zn(s);-0.762V $ $ C{{r}^{3+}}(aq)+3e\rightarrow Cr(s);-0.740V $ $ 2{{H}^{+}}(aq)+2e\rightarrow H_2(g);0.00V $ $ F{{e}^{3+}}(aq)+e\rightarrow F{{e}^{2+}}(aq);0.770V $ Which is the strongest reducing agent-

Options:

A) Zn(s)

B) Cr(s)

C) $ H_2( g ) $

D) $ F{{e}^{3+}}(aq) $

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Since oxidation potential of Zn is highest hence strongest reducing agent.



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