In a solution , the electricity can pass from it , if there is presence of free ions , as they are mobile and helps to conduct the electricity .
Therefore , the present of free ions is necessary for a solution to conduct electricity.
Hence, from the given options ,
Solution of water and (NH₄)₂S will conduct electricity as (NH₄)₂S will dissociate completely to the respective ions as they are dissolved in water , and the ions will help to conduct electricity.
Whereas ,
Solution of water and C₆H₁₂O₆ will not conduct electricity , as C₆H₁₂O₆ in water will not dissociate completely , and does not produce ions , hence , won't conduct electricity.
