Which of the following best describes why ionic compounds like potassium bromide
(KBr) do NOT conduct electricity in solid form but do in molten form?
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A.
Solid KBr has weak ions that do not conduct electricity.
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B.
In molten form, KBr decomposes into gaseous atoms.
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C.
Ionic bonds prevent ion movement in solid KBr.
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D.
Solid KBr consists of neutral atoms with no free electrons.
Correct Answer:
C. Ionic bonds prevent ion movement in solid KBr.
Explanation:
Ionic compounds like potassium bromide do not conduct electricity in a solid state because the ions are locked in a rigid lattice and cannot move. Once melted into a liquid form, the bonds loosen, enabling the ions to move freely and carry an electrical charge.
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