$BF_3$ is used as a catalyst in several industrial processes due to its:

In the $OF_2$ molecule,the number of bonding and lone pairs of electrons are,respectively,........

Which of the following species has no $p\pi - p\pi$ bond but has a bond order equal to that of $O_2$?

Consider the following species and select the incorrect statement $:-$ $NH_3, PCl_4^{\oplus}, NH_2^{-}, SO_2, SO_3, BF_3, PCl_3, IF_7$

Species isoelectronic with $BF_3$ would be

Amongst the following,the total number of species $NOT$ having $8$ electrons around the central atom in its outermost shell is $NH_3$,$AlCl_3$,$BeCl_2$,$CCl_4$,$PCl_5$: