Which of the following is noted as the simplest of the hydrocarbon compounds?

Methane is recognized as the simplest of the hydrocarbon compounds because it consists of just one carbon atom bonded to four hydrogen atoms, giving it the chemical formula CH4. This fundamental structure makes methane the most basic member of the alkane family, which are saturated hydrocarbons. It serves as the building block for more complex hydrocarbons, where additional carbon atoms can be added to form larger molecules like ethane, propane, and butane.

Methane’s simplicity not only makes it the first alkane but also makes it a key compound in various chemical processes, including combustion and as a precursor for many organic compounds. Understanding methane's structure and properties is essential in the study of hydrocarbons and organic chemistry as a whole.