Single correct option
Which one of the following is a characteristic property of ionic compounds?
- A. They have low melting points
- B. They are generally soluble in non-polar solvents
- C. They conduct electricity in solid state
- D. They conduct electricity in molten state
Show answer and solution
Answer: (D) They conduct electricity in molten state
Ionic compounds consist of a lattice of oppositely charged ions held by strong electrostatic forces, giving high melting points. They conduct only when molten or dissolved in water, as ions become free to move. They are insoluble in non-polar solvents such as benzene, and are non-conducting in the solid state.
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