Which of the following molecules does the carbon atoms have sp3 hybridization

Question

Cl2CO

CO

CS2

CH2Cl2

HCN

Answer 1

You need to know the structure of each compound in order to see the hybridization of the carbon atom(s).

Cl₂CO has C=O with 2 Cl atoms attached to the C atom. The C atom is 2p2 hybridized

CO has C≡O with a lone pair of electrons on both the C and O atoms. The C atom is sp hybridized

CS₂ is S=C=S so the C atom is sp hybridized

CH₂Cl₂ has 2 H atoms and 2 Cl atoms attached to the central C atom. The C atom is sp3 hybridized

HCN is H-C≡N. The C atom is sp hybridized