The molecule with the chemical formula C4H10O is an alcohol, as it contains an -OH group. To determine the type of isomerism, we need to look at the possible structures of the molecule and see if they differ in connectivity, functional groups, or spatial arrangement.There are two possible structures for C4H10O:1. Butanol CH3-CH2-CH2-CH2-OH 2. 2-Methylpropanol CH3-CH CH3 -CH2-OH These two structures have the same molecular formula but different connectivity of atoms. They are connected in different ways, leading to different structural arrangements. This makes them structural isomers.So, the isomerism type of the molecule with the chemical formula C4H10O is structural isomerism.