The standard reduction potential data at 25ºC is given below.Eo(Fe3+,

The standard reduction potential data at 25ºC is given below.Eo(Fe3+,Fe2+)=+0.77V;Eo(Fe2+,Fe)=–0.44VEo(Cu2+,Cu)=+0.34V;Eo(Cu+,Cu)=+0.52VEo[O2(g)+4H++4e–→2H2O]=+1.23V;Eo[O2(g)+2H2O+4e−→4OH–]=+0.40VEo(Cr3+,Cr)=–0.74V;Eo(Cr2+,Cr)=–0.91VMatch Eo of the redox pair in List I with the values given in List II and select the correct answer using the code given below the lists : List I List-IIP.Eo(Fe3+,Fe)1.−0.18 VQ.Eo(4H2O→4H++4OH−)2.−0.4 VR.Eo(Cu2++Cu→2Cu+)3.−0.04VS.Eo(Cr3+,Cr2+)4.−0.83 V PQRS(A)4123(B)2341(C)1234(D)3412

Answer»

The standard reduction potential data at $25 º C$ is given below.

$E^{o} (F e^{3 +}, F e^{2 +}) = + 0.77 V;$

$E^{o} (F e^{2 +}, F e) = - 0.44 V$

$E^{o} (C u^{2 +}, C u) = + 0.34 V;$

$E^{o} (C u^{+}, C u) = + 0.52 V$

$E^{o} [O_{2} (g) + 4 H^{+} + 4 e^{-} \to 2 H_{2} O] = + 1.23 V;$

$E^{o} [O_{2} (g) + 2 H_{2} O + 4 e^{-} \to 4 O H^{-}] = + 0.40 V$

$E^{o} (C r^{3 +}, C r) = - 0.74 V;$

$E^{o} (C r^{2 +}, C r) = - 0.91 V$

Match $E^{o}$ of the redox pair in List I with the values given in List II and select the correct answer using the code given below the lists :

	List I		List-II
P.	$E^{o} (F e^{3 +}, F e)$	1.	$- 0.18 V$
Q.	$E^{o} (4 H_{2} O \to 4 H^{+} + 4 O H^{-})$	2.	$- 0.4 V$
R.	$E^{o} (C u^{2 +} + C u \to 2 C u^{+})$	3.	$- 0.04 V$
S.	$E^{o} (C r^{3 +}, C r^{2 +})$	4.	$- 0.83 V$

	$P$	$Q$	$R$	$S$
$(A)$	4	1	2	3
$(B)$	2	3	4	1
$(C)$	1	2	3	4
$(D)$	3	4	1	2

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