The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mho cm2 and at infinite dilution is 400 mho cm2. The dissociation constant of this acid is
1.25 × 10-5
1.25 × 10-6
6.25 × 10-4
1.25 × 10-4
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)
Which one of the following pairs of substances on reaction will not evolve H2 gas?
Iron and H2SO4 (aqueous)
Iron and Steam
Copper and HCl (aqueous)
Sodium and Ethyl alcohol
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
On heating one end of a piece of a metal, the other end becomes hot because of
Energised electrons moving to the other end
Resistance of the metal
Mobility of atoms in the metal
Minor perturbation cell in the energy of atoms .
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
Without losing its concentration ZnCl2 solution cannot be kept in contact with
Au
Al
Pb
Ag
___________ ion is the weakest oxidising agent.
Hydrogen
Lithium
Fluorine
Oxide
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
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
zero
Hundred
