MHT CET202523 Apr 2025Evening ShiftChemistryElectrochemistryActual
Which from following is nonconductor of electricity?
Options
- ASolid sodium chloride
- BAqueous potassium chloride
- CGraphite (s)
- DCopper metal (s)
Correct answer
A. Solid sodium chloride
Step-by-step solution
The electrical conductivity of a substance depends on the presence of mobile charge carriers. Solid sodium chloride (A) is an ionic compound with ions locked in fixed lattice positions, making it a nonconductor. Aqueous potassium chloride (B) dissociates into mobile K^+ and Cl^- ions in solution, conducting electricity effectively. Graphite (C) features delocalized -electrons from sp ^2 hybridized carbon atoms, allowing excellent conduction. Copper metal (D) possesses a sea of delocalized valence electrons that mov