What is a common characteristic of Carbon Monoxide (CO)?

Carbon Monoxide (CO) is commonly known as a colorless and tasteless gas. This characteristic is significant because it means that CO cannot be detected by human senses, making it especially dangerous as it can accumulate in enclosed spaces without being noticed.

The lack of color and taste means that individuals may unknowingly breathe in CO, leading to symptoms of poisoning which can escalate rapidly. Understanding this property is crucial, particularly in contexts where combustion processes occur, such as in vehicles, heating systems, or any combustion appliances, where CO may be produced as a byproduct.

Recognizing that CO is colorless and tasteless emphasizes the importance of utilizing CO detectors in homes and workplaces to safeguard against its harmful effects. Other options do not accurately describe the nature of CO; for instance, CO does indeed not have a distinct odor, nor does it increase oxygen levels in the blood—it actually binds with hemoglobin more effectively than oxygen, reducing the blood's ability to transport oxygen. Additionally, CO is lighter than air and is indeed toxic, contradicting the claim that it is non-toxic.