The mixture of hydrogen, methane, and carbon monoxide is called:

The mixture of hydrogen, methane, and carbon monoxide is commonly known as Coal gas. This combustible gaseous fuel was historically produced from coal through a process called coal gasification and was widely used for lighting and heating before the advent of natural gas.

• CNG (Compressed Natural Gas) is primarily composed of methane and is used as a fuel for vehicles.
• Biogas is produced from the anaerobic digestion of organic matter and consists mainly of methane and carbon dioxide.
• Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane.