Kohlrausch's law states that at.
Finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte .
Infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.
Infinite dilution, each ion makes definite contribution to conductance of an electrolyte , whatever be the nature of the other ion of the electrolyte.
Infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte. whatever be the nature of the other ion of the electrolyte.
A 5 A current is passed through a solution of zinc sulphate for 40 min. The amount of zinc deposited at the cathode is.
40.65 g
0.4065g
4.065g
65.04g
AI2o3 is reduced by electrolysis at low potentials and high currents. If 4.0 x 104 A of current is passed through molten AI2O3for 6 h, what mass of aluminium is produced ? (Assume 100% current efficiency, at mass of AI = 27 g mol-1)
9.0 x 103g
8.1 x 104g
2.4 x 105g
1.3 x 104g
Given,
0.52 V
0.90 V
0.30 V
0.38 V
The specific conductance of 0.1 NKCI solution at 23oC 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
0.66cm-1
0.918cm-1
1.12 cm-1
The most convenient method to protect the bottom of the ship made of iron is.
Coating it with red lead oxide.
White tin plating.
Connecting it with mg block.
Connecting it with Pb block.
Equivalent conductance of NaCI, HCI and C2H5COONa at infinte 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
Standard reduction potentials at 25oC of Li+/Li,Ba2+/Ba,Na+/Na and Mg2+/Mg are -3.05,-2.90,2.71 and -2.37 volt respectively. Which one of the following is the strongest oxidising agent ?
Mg2+
Ba2+
Na+
Li+
Eo for the cell, Zn [Zn2+ (aq)] [Cu2+(aq)] Cu is 1.10 V at 25oC. The equilibrium constant for the reaction,
10-37
10-28
10-18
10-17
An electrochemical cell is shown below;
Pt,H2[1atm]/HCI (0.1M)//CH3COOH(0.1M)H2(1atm),Pt. The emf of the cell will not be zero, because
Emf depends on molarities of acids used.
pH of 0.1 M HCI and 0.1 M CH3COOH is not same
The temperature is constant.
Acids used in two compartments are different.
