H2COSubstanceTreat C as the CentralIF,O3N2H4atomLewis structuresNumber of bondinggroupsNumber of lone pairsNumber of electrongroups about the centralatomElectron geometryMolecular geometryApproximate bond anglesPolarity of moleculeor ionNumber of resonancestructuresHybridization state aboutthe central atom

Since we answer up to three subparts , we will answer the first three. Please resubmit the question and specify the other subparts to be answered.To draw the Lewis dot structure add the valence electrons of each constituent atom and arrange them in such a way that each atom should get eight electrons around it. If a molecule has net dipole moment the, it is polar. For non polar molecules net dipole moment is zero. Dipole moment is a vector quantity and the net dipole moment is the vector sum of all the bond dipoles. Hybridisation of the central atom is obtained by considering the number of electrons around the central atom. If it is two then, it corresponds to sp -hybridisation. If it is three then, it corresponds to sp2 hybridisation. If it is four then, it corresponds to sp3 hybridisation. If it is five then, it corresponds to sp3d hybridisation. If it is three then, it corresponds to sp3d2 hybridisation. If it is three then, it corresponds to sp3d3 hybridisation.H2CO molecule: Lewis dot structure: Total number of valence electrons are: [4+6+(2x1)]e-=12e- Number of bonding groups are four. Number of lone pairs: two (on oxygen) and on the central atom carbon the lone pairs are zero. Number of electron groups about the central atom: three Electron geometry: trigonal planar Molecular geometry: trigonal planar Approximate bond angles: 120o. Polarity of the molecule: polar Number of resonance structures: Three. Hybridisation of central atom: sp2.IF2- : Lewis dot structure: Total number of valence electrons are: [7+(2x7)+1]e-=22e- Number of bonding groups two. Number of lone pairs: nine (total), on the central atom : three. Number of electron groups about the central atom: five Electron geometry: trigonal bipyramidal. Molecular geometry: linear. Approximate bond angles: 180o. Polarity of the molecule: polar Number of resonance structures: one. Hybridisation of central atom: sp3d.O3 : Lewis dot structure: Total number of valence electrons are: [6×3]e-=18e- Number of bonding groups three. Number of lone pairs: six (total), on the central atom : one. Number of electron groups about the central atom: three Electron geometry: trigonal planar. Molecular geometry: bent. Approximate bond angles: less than 120o. Polarity of the molecule: polar Number of resonance structures: two. Hybridisation of central atom: sp2.