Question detail
What allows ionic compounds to conduct electricity when melted?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
How bonding and structure are related to the properties of substances
Question
- A. The presence of free-moving ions
- B. The presence of covalent bonds
- C. The presence of delocalised electrons
- D. The presence of strong intermolecular forces
Answer
The correct option is The presence of free-moving ions. This answer is correct because it matches the approved learning objective to link electrical conductivity in ionic compounds to ions that are free to move in the subtopic Properties of ionic compounds.
Explanation
The correct option is The presence of free-moving ions. The presence of free-moving ions is correct because it directly supports the approved learning objective to link electrical conductivity in ionic compounds to ions that are free to move. This belongs to the subtopic Properties of ionic compounds within How bonding and structure are related to the properties of substances, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Properties of ionic compounds.
Common mistake
Misunderstanding Ionic Conductivity
Students often think that ionic compounds conduct electricity in their solid state.
Explain that ionic compounds only conduct electricity when they are molten or dissolved in water, as this is when ions are free to move.
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