Which of the following gases is known as Carbon Monoxide?

The correct choice, Carbon Monoxide, is represented by the chemical formula CO. This gas is composed of one carbon atom bonded to one oxygen atom. It is colorless, odorless, and tasteless, which makes it particularly dangerous because it can accumulate in enclosed or semi-enclosed spaces without being detected. Carbon monoxide is produced during the incomplete combustion of carbon-containing fuels, which is a significant concern in industries such as coal mining. Understanding the chemical composition of gases like carbon monoxide is crucial for safety protocols in environments where combustion occurs, as exposure to this gas can lead to severe health issues, including poisoning.

In contrast, the other options are represented by different chemical formulas and refer to different gases: CH4 is the formula for methane, a primary component of natural gas; H2 stands for hydrogen gas; and O2 represents oxygen, which is essential for life but is not associated with toxicity like carbon monoxide. This differentiation is necessary for the identification of gases and understanding their properties, especially in environments where miners operate.