Question

explain four characteristic properties of covalent compound

Answer 1

Usually don't dissolve in water
Have high boiling point
Form 3d structure
Usually are carbon compounds

Answer 2

Here is a short list of the main properties of covalent compounds:

Most covalent compounds have relatively low melting points and boiling points

Covalent compounds usually have lower enthalpies of fusion and vaporization than ionic compounds.

Covalent compounds tend to be more flammable than ionic compounds.

When dissolved in water, they don't conduct electricity.