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
• B. Only ii) is correct
• C. Both i) and ii) are correct
• D. Both i) and ii) are incorrect

Answer 1

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.

$Strongelectrolyte\left(aq\right)\to {{Cation}^{+}}_{\left(aq\right)}+Anio{n}^{-}\left(aq\right)$

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