The type of hybrid orbitals of nitrogen in NO2+,NO3-and NH4+respectively are expected to be

The type of hybrid obtains of nitrogen can be decided by using VSEPR theory counting bp and as lp inNO2+=2 σ bp+0 lp= linear =sp-hybridised  NO3−=3 σ bp+0 lp⇒sp2-hybridised  NH4+=4 σ bp+0 lp⇒sp3-hybridised