The substances which allow electricity to pass through them are called conductors.
Example of conductors:
Metals, bases, salts, Solution of acids.
The conductors are of two types: Metallic conductors and Electrolytic conductors.
a) Metallic conductors or
Electronic conductors are substances which allow the passage of electricity through
them without undergoing any chemical change. In these, electricity is carried
exclusively by the transport of electrons. Hence these are also called electronic
conductors.
Example of Metallic conductors: Alloys,
Graphite, Metals
b) Electrolytic Conductors or Ionic
conductors are substances which allow
the passage of electricity through them in their molten states or more
commonly, in their aqueous solutions and undergo chemical decomposition. In these, electricity is
carried by the movement of positive and negative ions. Hence these are also
called ionic conductors.
Example of Electrolytic conductors:
Acids, bases and salts.
Metallic
Conduction vs Electrolytic Conduction
Metallic Conduction
|
Electrolytic
Conduction
|
The
flow of electric current is due to the flow of electrons.
|
The
flow of electric current is due to the flow of positive and negative ions.
|
There
is no transport of matter during the flow of electricity.
|
There
is actual transport of matter (in the form of ions)during the flow of
electricity.
|
Metallic
conduction decreases with increase in temperature.
|
Electrolytic
conduction increases with increase in temperature.
|
The
flow of electricity occurs without any chemical decomposition.
|
The
flow of electricity take place with chemical decomposition of the
electrolyte.
|
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