Carbon atom can have three different hybridizations. In an alkene carbon is sp2 hybridized forming three sigma bonds and one pi bond. While in alkynes it is sp hybridized with two sigma bonds and two pi bonds. It can be stated that if a carbon atom is bonded to four other atoms or if the number of lp+bp (steric number) is 4 it is sp3 hybridized, if the steric number is 3 it is sp2 hybridized and if it is 2, then the hybridization is sp.The H-C-H bond angle in allene (H2C=C=CH2) is almostThe number of lone pairs in the molecule phosgene isThe total number of bond pairs of electrons in the molecule (NC)2C=C(CN)2 is