1
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
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The $$E_{{M^{3 + }}/{M^{2 + }}}^o$$ values for Cr, Mn, Fe and Co are – 0.41, +1.57, + 0.77 and +1.97 V respectively. For which one of these metals the change in oxidation state form +2 to +3 is easiest?
A
Fe
B
Mn
C
Cr
D
Co
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25oC. The equilibrium constant of the reaction at 25oC will be
A
29.5 $$\times$$ 10-2
B
10
C
1 $$\times$$ 1010
D
1 $$\times$$ 10-10
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Standard reduction electrode potentials of three metals A,B&C are respectively +0.5 V, -3.0 V & -1.2 V. The reducing, powers of these metals are
A
A > B > C
B
C > B > A
C
A > C > B
D
B > C > A
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