Answer: [tex]NH_3[/tex]
Explanation:
a) [tex]H_2[/tex]: This is a non polar covalent compound which are held by weak vanderwaal forces of attraction.
b) [tex]SO_2[/tex]: This is a covalent compound which is polar due to the presence of lone pair of electrons and are held by dipole-dipole forces of attraction.
c) [tex]NH_3[/tex]: These are joined by a special type of dipole dipole attraction called as hydrogen bond. It forms between electronegative nitrogen atom and hydrogen atom and is the strongest interaction.
d) [tex]CF_4[/tex]: This is a covalent compound and is non polar which are held by weak vanderwaal forces of attraction.
e) [tex]BCl_3[/tex]: This is a covalent compound and is non polar which are held by weak vander waal forces of attraction.
