'आयनिक यौगिक' (ionic compounds) विद्युत चालन करते हैं:

उत्तर: (B) When dissolved in water or in molten state — Ionic compounds in solid state: ions fixed in crystal lattice → no conduction. When dissolved/molten: ions free to move → conduct electricity. NaCl solid = insulator; NaCl solution = conductor. This i...