properties of ionic compunds

1 which of the following compounds would have the lowest melting point?

potassium chloride

sodium chloride

sucrose

alumiunum oxide

2 which of the following statements explains why ionic compounds are brittle

when a force is applied to the crystal, the strong electrostic interaction cause similar ions to attract and shatter the crystal lattice

When a force is applied to the crystals, the weak electrostatic interactions cause oppostie ions to attract and shatter the crystal lattice.

when a force is applied to the crystal, the weak electrostatic interactions cause similar ions to repel and shatter the crystal lattice

when a force is applied to the crystals, the strong electrostatic interactions cause similar ions to repel and shatter the crystal lattice 

3 How does the dissolving an ionic compound in water increase electrical conductivity?

The water molecules chemically react witht the ions in the crystal and let the ions move freely.

the water molecules remove heat to break the ionic bonds in the crystal and let the ions mover freely.

the water molecules electrostatically interact with the ions in the crystal and let the ions move freely.

the water molecules apply heat to break the ionic bonds in the crystal and let the ions move freely.

4 which of the following is a property of an ionic compound?

high melting point 

malleable 

soft 

liquid at room temperature 

5 why do ionic compounds have high melting points?

the strong electrostatic interactions between ions require little energy to break the bonds

the weak electrostatic interactions between ions require a lot of energy to break the bonds

the weak electrostatic interactions between ions require little energy to break the bonds

the strong electrostatic interactions between ions require a lot of energy to break the bonds