Electrical __________ in one second is equal to electrical potential multiplied by total charge passed.
Energy
Work done
Heat
Circulation
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
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
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
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 potential difference between the two electrodes of a galvanic cell is called __________ potential.
Electrode
Cell
Oxidation
Reduction
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
Na is dissolved in Hg while it does not dissolved in Pt
Concentration of H+ ions is larger when Pt electrode is taken
_________ 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
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)
Conventionally, the potential of standard hydrogen electrode is assigned to be ________ at all temperatures.
One
Two
zero
Hundred