How do ionic bonds affect the properties of ionic compounds?

the bonds weakly hold ions together, increasing the melting point.
the bonds strongly hold ions together, reducing the boiling point.
the bonds prevent ions from moving throughout the crystal, so a solid ionic compound is a poor conductor.
the bonds prevent electrons from moving throughout the crystal, so a solid ionic compound is a poor conductor.

The correct answer is :

The bond prevent ions from moving throughout the crystal, so a solid ionic compound is a poor conductor.

The explanation:

1- the bonds prevent electrons from moving, since the ions are locked in place and don't want their electrons to go.

2- Ionic substances form giant ionic lattices containing oppositely charged ions.

3- They have high melting and boiling points

4- conduct electricity when melted or dissolved in water.

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> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.