Without losing its concentration ZnCl2 solution cannot be kept in contact with
Au
Al
Pb
Ag
_________ is the equilibrium constant of the reaction Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag (s), whose Eocell = 0.46.∨.
3.92 × 1015
3.29 × 1013
3.92 × 1011
3.29 × 1011
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+
_________ 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 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
If the standard electrode potential of an electrode is __________, then its reduced from is more stable compared to hydrogen gas.
Zero
Less than zero
Unit
Greater than zero
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
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
zero
Hundred
Electrical __________ in one second is equal to electrical potential multiplied by total charge passed.
Energy
Work done
Heat
Circulation
The efficiency of a fuel cell is given by
ΔG / ΔS
ΔG / ΔH
ΔS / ΔG
ΔH / ΔG