1
JEE Main 2017 (Online) 8th April Morning Slot
+4
-1
What is the standard reduction potential (Eo) for Fe3+ $$\to$$ Fe ?
Given that :
Fe2+ + 2e$$-$$ $$\to$$ Fe; $$E_{F{e^{2 + }}/Fe}^o$$ = $$-$$0.47 V
Fe3+ + e$$-$$ $$\to$$ Fe2+; $$E_{F{e^{3 + }}/F{e^{2 + }}}^o$$ = +0.77 V
A
$$-$$ 0.057 V
B
+ 0.057 V
C
+ 0.30 V
D
$$-$$ 0.30 V
2
JEE Main 2017 (Online) 8th April Morning Slot
+4
-1
Consider the following standard electrode potentials (Eo in volts) in aqueous solution :

Element M3+ /M M+ /M
A1 -1.66 + 0.55
T1 +1.26 - 0.34

Based on these data, which of the following statements is correct ?
A
T1+ is more stable than A13+
B
A1+ is more stable than A13+
C
T1 + is more stable than A1+
D
T13+ is more stable than A13+
3
JEE Main 2017 (Offline)
+4
-1
Given
$$E_{C{l_2}/C{l^ - }}^o$$ = 1.36 V, $$E_{C{r^{3 + }}/Cr}^o$$ = - 0.74 V
$$E_{C{r_2}{O_7}^{2 - }/C{r^{3 + }}}^o$$ = 1.33 V, $$E_{Mn{O_4}^ - /Mn ^{2+}}^o$$ = 1.51 V
Among the following, the strongest reducing agent is :
A
Mn2+
B
Cr3+
C
Cl
D
Cr
4
JEE Main 2016 (Online) 10th April Morning Slot
+4
-1
Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is :
A
2.24 L
B
4.48 L
C
6.72 L
D
8.96 L
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