alleryStart learning →Why do ionic compounds such as NaCl conduct electricity in the molten state but not when solid?
Aelectrons flow only in the solid state
Bions are free to move only when molten
Cthey decompose completely on melting
Dthey lose their charge when solid
Answer & Solution
Correct answer: B. ions are free to move only when molten
1. Conduction needs charged particles that can move.
2. In the **solid**, ions are locked in a rigid lattice and cannot move, so no conduction.
3. On **melting**, the strong inter-ionic forces are overcome and the ions move freely, so molten ionic compounds conduct electricity.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch3 'Metals and Non-metals', §3.3.1_
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