Which of the following compounds contains both polar and non-polar bonds?

Which of the following pairs are isoelectronic and isostructural: $NO_3^-$,$CO_3^{2-}$,$ClO_3^-$,$SO_3$?

Which of the following leads to bonding?

For the following molecules/ions,identify whether the octet rule is obeyed or not obeyed. Provide the reason.
$(1)$ $PCl_5$ $(2)$ $SF_6$ $(3)$ $PF_5$ $(4)$ $NH_4^+$ $(5)$ $BeCl_2$ $(6)$ $NCl_3$

Which of the following contains both covalent and ionic bonds?

The total number of lone pairs of electrons on oxygen atoms of ozone $(O_3)$ is $...........$.