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Question

Which of the following does not conduct electricity in its molten state?

A
Iron
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B
Magnesium oxide
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C
Lithium fluoride
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D
Sulphur
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Solution

The correct option is C Sulphur
Sulphur is a non-metal so it does not conduct electricity. Iron is a metal so it conducts electricity Magnesium oxide and Lithium fluoride are ionic compounds that contains ions which conducts electricity in molten state.

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