Redox Reactions And Electrochemistry Ques 123

Question: The standard reduction potentials at $ 298,K $ for the following half reactions are given against each $ Z{n^{2+}}(aq.)+2e $ ⇌ $ Zn(s) $ ; - 0.762 $ C{r^{3+}}(aq)+3e $ ⇌ $ Cr(s) $ ; - 0.740 $ 2{H^{+}}(aq)+2e $ ⇌ $ H_2(g) $ ; 0.00 $ F{e^{3+}}(aq)+e $ ⇌ $ F{e^{2+}}(aq) $ ; 0.770 Which is the strongest reducing agent [IIT 1981; MP PET/PMT 1988; MP PMT 1989; MH CET 2001]

Options:

A) $ Zn(s) $

B) $ Cr(s) $

C) $ H_2(g) $

D) $ F{e^{2+}}(aq) $

Show Answer

Answer:

Correct Answer: A

Solution:

More negative is the reduction potential, higher will be the reducing property, i.e. the power to give up electrons.



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