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
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+
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 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
_________ 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
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
If the standard electrode potential of an electrode is __________, then its reduced from is more stable compared to hydrogen gas.
Unit
In electrolysis of NaCl when Pt electrode is taken then H2 is liberated at cathode while with Hg cathode it forms sodium amalgam because
Hg is more inert than Pt
More voltage is required to reduce H+ at Hg than at Pt
Concentration of H+ ions is larger when Pt electrode is taken
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
zero
Hundred
______________ equation is used to calculate the cell potential.
Bragg's
Ideal gas
Nernst
Solution