Question:
Which from following is nonconductor of electricity?
Which from following is nonconductor of electricity?
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Ionic compounds conduct only in molten or aqueous states, not in solid state.
Updated On: Apr 30, 2026
- Solid sodium chloride
- Aqueous potassium chloride
- Graphite (s)
- Copper metal (s)
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The Correct Option is A
Solution and Explanation
Step 1: Requirement for Conduction
Electricity conduction requires mobile charge carriers (free electrons or free ions).
Step 2: Analysis
- Aqueous KCl: Ions are mobile in solution. - Graphite: Has delocalized free electrons. - Copper: Metallic bonding provides free electrons. - Solid NaCl: Ions are present but fixed in a rigid crystal lattice.
Step 3: Conclusion
Because ions cannot move in the solid state, solid NaCl acts as an insulator.
Final Answer:(A)
Electricity conduction requires mobile charge carriers (free electrons or free ions).
Step 2: Analysis
- Aqueous KCl: Ions are mobile in solution. - Graphite: Has delocalized free electrons. - Copper: Metallic bonding provides free electrons. - Solid NaCl: Ions are present but fixed in a rigid crystal lattice.
Step 3: Conclusion
Because ions cannot move in the solid state, solid NaCl acts as an insulator.
Final Answer:(A)
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