The correct answer is ammonia (A). Ammonia is a colorless gas with a pungent odor. It is a common household chemical and is used in many cleaning products. Ammonia is also used in the production of fertilizers, plastics, and explosives.
Carbon monoxide (B) is a colorless, odorless gas that is poisonous. It is produced when carbon is burned in an incomplete combustion process. Carbon monoxide can cause death if it is inhaled in high concentrations.
Oxygen (C) is a colorless, odorless gas that is essential for life. It is the most abundant gas in the Earth’s atmosphere. Oxygen is used in cellular respiration, which is the process by which cells produce energy.
Hydrogen (D) is a colorless, odorless gas that is the lightest element in the universe. It is used in the production of ammonia, fertilizers, and plastics. Hydrogen is also used in fuel cells, which are devices that convert hydrogen and oxygen into electricity.
In conclusion, the correct answer is ammonia (A). Ammonia is a colorless gas with a pungent odor. It is a common household chemical and is used in many cleaning products. Ammonia is also used in the production of fertilizers, plastics, and explosives.