Description : Which of the following is used as anesthetic? (1) NH3 (2) NO (3) NO2 (4) N2O
Last Answer : (2) NO Explanation: Nitrous oxide (NO), commonly known as laughing as or happy gas, is the most commonly used inhalation anesthetic in dentistry and is commonly used in emergency centers ... inorganic inhalation agent that is colorless, odorless to sweet-smelling, and nonirritating to the tissues.