The Hybridization of carbon in carbon sub oxide is
Each carbon atom in carbon suboxide (C3O2) is sp - hybridized. If carbon is bonded with a double bond from both sides, then the carbon is said to have undergone sp hybridization.
The structure is O=C=C=C=O.
sp sp sp
all bonds are single or sigma, the hybridization is sp3
all bonds are single and one pie or positive, the hybridization is sp2
all bonds are single and two pie , the hybridization is sp