Question

If the conductivity or non-conductivity of electricity is affected by a solution in an electric circuit, which one of the following solutions will not conduct electricity?​

Answer 1

NaCl (common salt) is solid in state and solid ions or compounds don't conduct electricity. It needsto be either melted, molten or dissolved in a solution (i.e. water) first. Only then will the electrons be free to move to either the Cathode (-ve) or to the Anode (+ve). In a liquid state the electrons are free enough to move.