Electrochemistry

Chemistry
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A reversible galvanic cell is connected to an external battery. If the EMF of the battery is less than the EMF of the galvanic cell, then the current:

A
will not pass through the circuit
B
will flow from the battery to the galvanic cell
C
will flow from the galvanic cell to the battery
D
can flow in any direction
Medium
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A half cell reaction is one which:

A
involves only half a mole of electrolyte
B
goes only half way to completion
C
takes place at one electrode
D
consumes half a unit of electricity
Medium
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Which of the following is not true?

A
The electrode which pushes electrons into external circuit is known as anode
B
The electrode which pulls electrons out of external circuit is known as cathode
C
Weak electrolytes conduct relatively small quantity of electricity than strong electrolytes
D
Effect of dilution on conductance of strong electrolyte can be explained by Arrhenius theory.
Medium
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Corrosion is a/an:

A
physical change
B
neutralisation reaction
C
electrochemical change
D
none of the above
Medium
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In the given reaction, the reduction half cell reaction is:

A
B
C
  e
D
   
Medium
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The electrochemical cell stops working after some time because:

A
electrode potentials of both electrodes becomes zero
B
electrode potentials of both electrodes becomes equal
C
temperature of the cell increases
D
the reaction starts proceeding in opposite direction
Hard
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Faraday laws hold good :

A
at all pressures
B
only at 298k
C
in all concentrations
D
in different solvents
Medium
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In hydrogen evolution type of corrosion with respect to hydrogen electrode which of the following is correct ?

A
the metal with more negative SRP value under the given conditions
B
the metal with more positive SRP value under the given conditions
C
the metal with both negative and positive SRP values
D
All the above
Medium
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In an electrolytic cell, the current flows from:

A
cathode to anode in outer circuit
B
anode to cathode outside the cell
C
cathode to anode inside the cell
D
current does not flow
Medium
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