Match List-I with List-II :

	List-I (Species)		List-II (Hybrid Orbitals)
(a)	$$S{F_4}$$	(i)	$$s{p^3}{d^2}$$
(b)	$$I{F_5}$$	(ii)	$${d^2}s{p^3}$$
(c)	$$NO_2^ + $$	(iii)	$$s{p^3}d$$
(d)	$$NH_4^ + $$	(iv)	$$s{p^3}$$
		(v)	$$sp$$

Choose the correct answer from the options given below :

The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.

Amongst the following, the linear species is :

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :