[amp_mcq option1=”NH3″ option2=”N2O” option3=”NO2″ option4=”N2O” correct=”option4″]
The correct answer is D. Nitrous oxide (N2O), also known as laughing gas, is a gas that is used as an anesthetic. It is a colorless, odorless gas that is slightly heavier than air. Nitrous oxide is used to produce a state of anesthesia, which is a loss of sensation or feeling. It is often used in dentistry and surgery to reduce pain and anxiety. Nitrous oxide is also used as a recreational drug, and it is known for its euphoric effects.
Option A, ammonia (NH3), is a gas that is used as a fertilizer and a cleaning agent. It is a colorless, pungent gas that is lighter than air. Ammonia is not used as an anesthetic.
Option B, nitrogen (N2), is a gas that makes up about 78% of the Earth’s atmosphere. It is a colorless, odorless gas that is slightly lighter than air. Nitrogen is not used as an anesthetic.
Option C, nitrogen dioxide (NO2), is a gas that is used as a propellant and a bleaching agent. It is a reddish-brown gas that is heavier than air. Nitrogen dioxide is not used as an anesthetic.