Gasses Mcqs 21- The gas law that states that volume is directly proportional to the number of moles of gas at constant temperature and pressure is known as? A. Boyle’s LawB. Charles’ LawC. Ideal Gas LawD. Avogadro’s Law View Answer Answer : D. Avogadro's Law Description 22- What is the volume occupied by 1 mole of an ideal gas at STP? A. 1 LB. 22.4 LC. 10 LD. 44.8 L View Answer Answer : B. 22.4 L Description 23- Which gas is used in the process of welding? A. ArgonB. OxygenC. NitrogenD. Hydrogen View Answer Answer : D. Hydrogen Description 24- Which of the following gases is used as a refrigerant? A. NitrogenB. AmmoniaC. ChlorofluorocarbonsD. Carbon dioxide View Answer Answer : C. Chlorofluorocarbons Description 25- What is the chemical formula for carbon monoxide? A. COB. CO₂C. C₄H₆D. C₂H₆ View Answer Answer : A. CO Description 26- What is the chemical formula of hydrogen gas? A. HB. H₂C. H₃D. H₄ View Answer Answer : B. H₂ Description 27- What is the gas that fills the bubbles in carbonated drinks? A. HeliumB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 28- The pressure of a gas is inversely proportional to its volume at constant temperature. This is known as: A. Boyle’s Law B. Charles’ LawC. Dalton’s LawD. Ideal Gas Law View Answer Answer : A. Boyle’s Law Description 29- What is the principle behind the functioning of a barometer? A. Boyle’s LawB. Charles’ LawC. Avogadro’s LawD. Atmospheric pressure on mercury View Answer Answer : D. Atmospheric pressure on mercury Description 30- What happens to the pressure of a gas if its volume decreases at constant temperature? A. Pressure increasesB. Pressure fluctuatesC. Pressure decreasesD. Pressure remains constant View Answer Answer : A. Pressure increases Description 31- Which of the following gases is used in light bulbs? A. NeonB. ArgonC. HeliumD. Nitrogen View Answer Answer : B. Argon Description 32- Which gas is used in the process of breathing in mammals? A. HeliumB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : B. Oxygen Description 33- What is the chemical formula of ammonia gas? A. N₂B. NH₂C. NH₃ D. N₂H₄ View Answer Answer : C. NH₃ Description 34- Which of these gases is used in producing acetylene torches? A. Oxygen and NitrogenB. Oxygen and AcetyleneC. Oxygen and HeliumD. Nitrogen and Carbon dioxide View Answer Answer : B. Oxygen and Acetylene Description 35- Which gas is mainly responsible for the formation of ozone in the atmosphere? A. HeliumB. Carbon dioxideC. NitrogenD. Oxygen View Answer Answer : D. Oxygen Description 36- What is the gas with the lowest molecular weight? A. HeliumB. OxygenC. HydrogenD. Nitrogen View Answer Answer : C. Hydrogen Description 37- Which of the following gases is a component of smog? A. OxygenB. HydrogenC. Nitrogen oxidesD. Carbon monoxide View Answer Answer : C. Nitrogen oxides Description 38- What gas is released during the combustion of fossil fuels? A. ArgonB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 39- What is the gas law that relates pressure, volume, and temperature? A. Ideal Gas LawB. Boyle’s LawC. Charles’ LawD. Avogadro’s Law View Answer Answer : B. Boyle’s Law Description 40- Which gas is used in airbags in vehicles? A. ArgonB. NitrogenC. Carbon dioxideD. Nitrogen and Sodium azide View Answer Answer : D. Nitrogen and Sodium azide Description 1 2 3 4 5 6 7 8
