Electrochemistry

Section: Chemistry

Question : 22 of 30

Marks: +1, -0

The standard reduction potential data at 25‌0C is given below.
E‌0 (Fe‌3+,Fe‌2+) = + 0.77 V ;
E‌0 (Fe‌2+,Fe) = - 0.44 V ;
E‌0 (Cu‌2+,Cu) = + 0.34 V ;
E‌0 (Cu‌+,Cu) = + 0.52 V ;
E‌0 (O2(g) + 4H‌+ + 4e‌− → 2H‌2O) = + 1.23 V ;
E‌0 (O2(g) + 2H‌2O + 4e‌− → 4OH) = + 0.40 V ;
E‌0 (Cr‌3+,Cr) = - 0.74 V ;
E‌0 (Cr‌2+,Cr) = - 0.91 V ;
Match E‌0 of the rebox 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. E‌0(Fe‌3+,Fe)	1. -0.18 V
Q. E‌0(4H‌2O ⇌ 4H‌+ + 4OH‌−)	2. -0.4 V
R. E‌0(Cu‌2+,Cu) →2Cu‌+	3. -0.04 V
S. E‌0(Cr‌3+,Cr‌2+)	4. -0.83 V

[JEE Adv 2013 P2]

P-4 Q-1 R-2 S-3
P-2 Q-3 R-4 S-1
P-1 Q-2 R-3 S-4
P-3 Q-4 R-1 S-2

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