Given that E_ K^ + /K ^o , = , - ,2.93 ,V ,; E_ F e^ 2 + /Fe ^o ,… - Vidyadip

MCQ

Given that $E_{{K^ + }/K}^o\, = \, - \,2.93\,V\,;$

$E_{F{e^{2 + }}/Fe}^o\, = \, - \,0.44\,\,V\,;\,\,E_{Z{n^{2 + }}/Zn}^o\, = \, - \,0.76\,\,V\,;\,$

$E_{C{u^{ + 2}}/Cu}^o\, = \,0.34\,\,V$

Based on this data, which of the following is the strongest reducing agent ?

A
$Cu_{(s)}$
B
$K^+_{(aq)}$
C
$Zn^{2+}_{(aq)}$
✓
$Fe_{(s)}$

✓

Answer

Correct option: D.

$Fe_{(s)}$

d
$K_{(aq)}^ + $ and $Zn_{(aq)}^ {2+} $ can not lose electron(s). $Fe$ has greater tendency to lose electrons than $cu$.

$[E_{Fe/F{e^{2 + }}}^o\, = \,0.44\,\,V\, > \,E_{Cu/C{u^{2 + }}}^o = \, - \,0.34\,V]$

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