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1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Electrolyte: KCl KNO3 HCl NaOAc NaCl
$${ \wedge ^\infty }(Sc{m^2}mo{l^{ - 1}}):$$
149.9 145 426.2 91 126.5
Calculate $$ \wedge _{HOAc}^\infty $$ Using appropriate molar conductances of the electrolytes listed above at infinite dilution in H2O at 25oC
A
517.2
B
552.7
C
390.7
D
217.5
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
For a spontaneous reaction the ∆G , equilibrium constant (K) and $$E_{cell}^o$$ will be respectively
A
-ve, >1, +ve
B
+ve, >1, -ve
C
-ve, <1, -ve
D
-ve, >1, -ve
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Aluminium oxide may be electrolysed at 1000oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al3+ + 3e- $$\to$$ Alo To prepare 5.12 kg of aluminium metal by this method would require
A
5.49 $$\times$$ 107 C of electricity
B
1.83 $$\times$$ 107 C of electricity
C
5.49 $$\times$$ 104 C of electricity
D
5.49 $$\times$$ 101 C of electricity
4
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

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