Question

The compound that does not have a lone pair of electrons is _________. (water, ammonia, carbon tetra chloride).

Answer 1

The compound that does not have a lone pair of electrons on the central atom is carbon tetrachloride $CC{l}_4$. The C atom has 4 valence electrons that are shared with 4 electrons of 4 Cl atoms to form 4 $C-Cl$ bonds. Thus C atom has no lone pair of electrons.
Note: Each Cl atom has 3 lone pairs of electrons.
Water $H_{2}O$ molecule has two lone pairs of electrons on the O atom.
Ammonia, $N{H}_3$. the molecule has one lone pair of electrons on the N atom.