The hybridisation of central atoms in N3​−, NOCl and N2​O respectively are:Asp,sp2,spBsp,sp,sp3Csp2,sp,spDsp2,sp2,sp

The hybridisation of central atoms in N₃^-3​−, NOCl and N₂2​O respectively are sp,sp2,sp.
The central N atom in azide ion contains two bonding domains and zero lone pairs of electrons.
The central O atom in NOCl contains 2 bonding domains and 1 lone pair of electrons. The central N atom in N₂2​O contains two bonding domains and zero lone pair of electron.