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Question

Molten sodium chloride conducts electricity due to the presence of :

A
free electrons
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B
free ions
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C
free molecules
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D
atoms of sodium and chlorine
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Solution

The correct option is B free ions
Ionic compounds like sodium chloride conduct electricity in the molten state since the elecrostatic forces of attraction between the oppositely charged ions are overcome due to the heat. Thus, the ions move freely and conduct electricity.

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