The cell potential is the difference between the electrode potentials of the cathode and anode is called ____________
Cell emf
Electrode potential
Oxidation potential
Reduction potential
Without losing its concentration ZnCl2 solution cannot be kept in contact with
Au
Al
Pb
Ag
_________ 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
Reduction potential for the following half-cell reactions are
+ 0.32 V
- 0.32 V
+ 1.20 V
- 1.20 V
There is a relationship between ___________ of the reaction and standard potential of the cell in which that reaction takes place.
Reactants
Equilibrium constant
Products
Catalyst
On the basis of the information available from the reaction
4/3 Al + O2 → 2/3 Al2O3, ΔG = -827 kJ mol-1 of O2, the minimum emf required to carry out the electrolysis of Al2O3 is (F = 96500 C mol-1)
2.14 V
4.28 V
6.42 V
8.56 V
A hypothetical electrochemical cell is shown below
A | A+ (xM) || B+ (yM) | B
The emf measured is + 0.20 V. The cell reaction is
A + B+ → A+ + B
A+ + B → A + B+
A+ + e- → A; B+ + e- → B
The cell reaction cannot be predicted
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
Zero
Hundred
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
Electrical __________ in one second is equal to electrical potential multiplied by total charge passed.
Energy
Work done
Heat
Circulation
