Sodium hydroxide will conduct electricity only in fused or aqueous solution Why?

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Solution

Electrical conductivity is possible when ions or electrons moves freely.
Sodium chloride exist as ions in aqueous or fused solution.
Due to the movement of Na⁺ and Cl^-ions, they will conduct electricity.
So these ions are responsible for its conductivity.
But in solid sodium chloride, there is strong force of attraction between the ions .
So they are not free to move.
Hence ionic compounds do not conduct electricity in solid state.

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