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

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H−$$CSP2$$−H ; Hence bond angle $$120$$°. In Allene the two planes are present and they lie perpendicular to each other.:Cl· ·· ·−C| |: O :−Cl:· ·· ·→ Total $$8$$ lone pairsTotal $$18$$ bond pairs

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