What is the chemical formula for ethenol?

The chemical formula for ethenol is represented as CH₂=CH-O-H, which indicates the presence of a double bond between two carbon atoms (indicated by CH₂=CH) and a hydroxyl group (-OH) attached to one of the carbon atoms. This structure is characteristic of ethenol, also known as vinyl alcohol, which is an unsaturated alcohol.

In the correct formula, the double bond between the carbon atoms is a significant feature, distinguishing ethenol from other alcohols that typically have single bonds. The hydroxyl group signifies its classification as an alcohol.

The other options refer to different compounds that do not match the structure of ethenol. For instance, CCl₄ is carbon tetrachloride, a compound with four chlorine atoms bonded to carbon, and it is not an alcohol at all. The option CH₃CH₂OH represents ethanol, which has a different structure and is a saturated alcohol rather than an alcohol with a double bond. Lastly, CH₃CH-OHCH₃ describes propan-2-ol, which is also a different alcohol with distinct properties and structure. This underscores the importance of structural elements in properly identifying and naming organic compounds.