If the standard electrode potential is ___________, then hydrogen gas is more stable than the reduced form of the species.
Zero
Less than zero
Unity
Greater than zero
The specific conductance of a 0.1 N KCl solution at 23o C is 0.012 ohm-1 cm-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be
0.142 cm-1
0.66 cm-1
0.918 cm-1
1.12 cm-1
The cell potential is the difference between the electrode potential of the cathode and anode is called
Cell emf
Electrode potential
Oxidation potential
Reduction potential
The equivalent conductance of Ba2+ and Cl- are 127 and 76 ohm-1 cm-1 eq-1 respectively at infinite dilution. The equivalent conductance of BaCl2 at infinite dilution will be
139.52
203
279
101.5
For the cell reaction,
Cu2+ (C1, aq) + Zn (s) Zn2+ (C2, aq) + Cu (s) of an electrochemical cell, the change in free energy (ΔG) at a given temperature is a function of
In (C1)
In (C2/ C1)
In (C2)
In (C1 + C2)
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
zero
Hundred
Equivalent conductance of NaCl, HCl and C2H5COONa at infinite dilution are 126.45, 426.16 and 91 ohm-1 cm2, respectively. The equivalent conductance of C2H5COOH is
201.28 ohm-1 cm2
390.71 ohm-1 cm2
698.28 ohm-1 cm2
540.48 ohm-1 cm2
_________ equation shows the relation between the Gibbs energy of the reaction and the emf of the cell.
ΔrG = nFE
ΔrG = -nFE
ΔrG = nF Kc
ΔrG = -nF Kc
Cell reaction is spontaneous when
Eored is positive
ΔGo is negative
ΔGo is positive
The standard emf of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25oC. The equilibrium constant of the reaction would be
(Given F = 96500 C mol-1; R = 8.314 JK-1 mol-1)
2.0 × 1011
4.0 × 1012
1.0 × 102
1.0 × 1010
