Given: C o^ 3 + e^ - C o^ 2 + ; , E^o = 1.81 ,V P b^4 + 2 e^ - P … - Vidyadip

MCQ

Given:

$C{o^{3 + }}{e^ - } \longrightarrow C{o^{2 + }};\,{E^o} = 1.81\,V$

$P{b^4} + 2{e^ - } \longrightarrow P{b^{2 + }};\,{E^o} = + 1.67\,V$

$C{e^{4 + }} + {e^ - } \longrightarrow C{e^{3 + }};\,{E^o} = + 1.61\,V$

$B{i^{3 + }} + 3{e^ - } \longrightarrow Bi;\,{E^o} = + 0.20\,V$

Oxidizing power of the species will increase in the order

A
$C{e^{4 + }} < P{b^{4 + }} < B{i^{3 + }} < C{o^{3 + }}$
B
$C{o^{3 + }} < P{b^{4 + }} < C{e^{4 + }} < B{i^{3 + }}$
✓
$B{i^{3 + }} < C{e^{4 + }} < P{b^{4 + }} < C{o^{3 + }}$
D
$C{o^{3 + }} < C{e^{4 + }} < B{i^{3 + }} < P{b^{4 + }}$

✓

Answer

Correct option: C.

$B{i^{3 + }} < C{e^{4 + }} < P{b^{4 + }} < C{o^{3 + }}$

c
Lower the standard reduction potential, more the ability to get reduced higher the oxidizing power

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