Molten sodium chloride conducts electricity due to the presence of:

free electrons

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free molecules

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atoms

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free ions

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Solution

The correct option is C free ions
Molten sodium chloride conducts electricity due to the presence of free ions.

In solid-state, ionic compounds does not have any free ions , so they will not conduct electricity. But when melted, the molten ionic compounds will have free ions [ both cations with a positive charge(s) and anions with a negative charge(s) ] and can conduct electricity.

Option D is correct.

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