Final answer:
Ionic compounds conduct electricity in molten state and have high melting and boiling points.
Step-by-step explanation:
Ionic compounds are compounds composed of ions held together by ionic bonds. Some true statements about ionic compounds are:
- They conduct electricity in molten state. When an ionic compound is melted, its ions are able to move freely, allowing it to conduct electricity.
- They have high melting and boiling points. Ionic bonds are very strong, resulting in high melting and boiling points for ionic compounds.
On the other hand, the statement 'They consist of ions held together by covalent bonds' is false. Ionic compounds consist of ions held together by ionic bonds, not covalent bonds. Additionally, the statement 'They typically dissolve well in nonpolar solvents' is also false. Ionic compounds dissolve well in polar solvents like water, not nonpolar solvents.