Final answer:
The bond angles in CCl4 are greater than the bond angles in NH3 due to the lone pair of electrons on chlorine taking up space and affecting the bond angles.
Step-by-step explanation:
The bond angles in CCl4 should be greater than the bond angles in NH3. The lone pair of electrons on the chlorine change the bond angles from the ideal value because a lone pair of electrons takes up space the electrons in a bond.