1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Consider the following Eo values

$$E_{F{e^{3 + }}/F{e^{2 + }}}^o$$ = 0.77 V;

$$E_{S{n^{2 + }}/S{n}}^o$$ = -0.14 V

Under standard conditions the potential for the reaction

Sn(s) + 2Fe3+(aq) $$\to$$ 2Fe2+(aq) + Sn2+(aq) is :
A
1.68 V
B
0.63 V
C
0.91 V
D
1.40 V
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The standard e.m.f of a cell, involving one electron change is found to be 0.591 V at 25oC. The equilibrium constant of the reaction is (F = 96,500 C mol-1: R = 8.314 JK-1 mol-1)
A
1.0 $$\times$$ 101
B
1.0 $$\times$$ 1030
C
1.0 $$\times$$ 1010
D
1.0 $$\times$$ 105
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The limiting molar conductivities Λ° for NaCl, KBr and KCl are 126, 152 and 150 S cm2 mol-1 respectively. The Λ° for NaBr is
A
128 S cm2 mol-1
B
278 S cm2 mol-1
C
176 S cm2 mol-1
D
302 S cm2 mol-1
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
In a cell that utilises the reaction Zn(s) + 2H+ (aq) $$\to$$ Zn2+(aq) + H2(g) addition of H2SO4 to cathode compartment, will
A
lower the E and shift equilibrium to the left
B
increases the E and shift equilibrium to the left
C
increase the E and shift equilibrium to the right
D
Lower the E and shift equilibrium to the right
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