Which of the following accurately describes carbon monoxide?

Question

Responses

A colorless, odorless, very toxic gas which can be produced by gas or oil appliances
A colorless, odorless, very toxic gas which can be produced by gas or oil appliances

A thick, gray, toxic gas which is produced by fires
A thick, gray, toxic gas which is produced by fires

A colorless, toxic gas which smells like rotten eggs and is produced by leaks in a sewage system
A colorless, toxic gas which smells like rotten eggs and is produced by leaks in a sewage system

A colorless, flammable gas which is produced by toxic chemicals being stored past their expiration dates

Answer 1

The statement that accurately describes carbon monoxide is:

A colorless, odorless, very toxic gas which can be produced by gas or oil appliances.

Carbon monoxide (CO) is indeed a colorless, odorless gas that can be emitted from burning fossil fuels, such as those found in gas or oil appliances, and it is highly toxic. The other options do not accurately describe carbon monoxide.