1) A covalent crystal differs from an ionic crystal in that
a) only one of them is a poor electrical conductor.
b) only one of them has bonding that involves overlap of electronic orbitals.
c) only one of them possesses atomic order.
d) only one of them has high melting points.
e) only one of them is hard.
2) What are the important intermolecular forces acting in CHF3?
a) London dispersion forces only
b) only dipole-dipole interactions and H-bonding
c) dipole-dipole interactions and London dispersion forces
d) H-bonding, dipole-dipole interactions and London dispersion forces
e) ionic bonding