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Question

Consider the statements about electric conductivity.

i) Flow of electric current happens by the electron flow in a piece of copper metal.

ii) Flow of electric current happens due to the flow of electrons, molecules and ions in a solution of copper sulphate.


A
Only i) is correct
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B
Only ii) is correct
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C
Both i) and ii) are correct
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D
Both i) and ii) are incorrect
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Solution

The correct option is A Only i) is correct
Copper sulphate solution is a strong electrolyte and hence, on dissociation, only ions will be formed.

A solution/solute is said to be strong electrolyte if it completely, or almost completely, ionizes or dissociates in a solution. These ions are good conductors of electric current in the solution.

For a strong electrolyte the arrow points only in forward direction.

Strongelectrolyte(aq) Cation+(aq)+Anion(aq)

This is the general form of equation for a strong electrolyte.

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