Molecular compounds do not conduct electricity because they
a. break up into ions.
b. do not break up into ions.
c. do not dissolve in water.
d. have high melting points.

the answer is b)do not break up into ions.

Explanation:

Molecular compounds do not conduct electricity because they are molecularly formed by covalent bonds. Covalent bonds do not conduct electricity because electrons in atoms are strongly attracted to each other, so that they cannot be released or broken by electric current.

Unlike the materials that are conductive, since they are connected by ionic bonds, which allow them to circulate electricity.