Final answer:
Carbon disulfide (CS2) contains covalent double bonds between carbon and sulfur, while hydrogen cyanide (HCN) features a triple bond between carbon and nitrogen atoms, plus a linear geometry around the nitrogen due to sp hybridization.
Step-by-step explanation:
The compounds carbon disulfide (CS2) and hydrogen cyanide (HCN) contain different types of bonds. In carbon disulfide, the bonds between carbon (C) and sulfur (S) atoms are covalent double bonds. On the other hand, hydrogen cyanide exhibits a triple bond between the carbon and nitrogen atoms. This triple bond is formed because each atom shares three pairs of electrons.
Additionally, there is a single covalent bond between the carbon and hydrogen in HCN. The geometry around the nitrogen in HCN is linear due to sp hybridization, and the nitrogen atom also has a lone pair of electrons in one of its sp orbitals.