Gasses Mcqs 41- Which of the following gases is heavier than air? A. OxygenB. NitrogenC. HydrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 42- Which gas is released when metal reacts with acid? A. OxygenB. HydrogenC. NitrogenD. Carbon dioxide View Answer Answer : B. Hydrogen Description 43- What is the main component of biogas? A. MethaneB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : A. Methane Description 44- Which gas is responsible for acid rain? A. OxygenB. NitrogenC. Sulfur dioxideD. Carbon dioxide View Answer Answer : C. Sulfur dioxide Description 45- Which of the following gases is a product of the decomposition of organic matter? A. HeliumB. OxygenC. NitrogenD. Methane View Answer Answer : D. Methane Description 46- What gas is used in scuba tanks for deep-sea diving? A. NitroxB. HeliumC. NitrogenD. Oxygen View Answer Answer : A. Nitrox (Oxygen + Nitrogen) Description 47- What is the name of the gas that is used in lighted signs and advertising displays? A. ArgonB. NeonC. HeliumD. Nitrogen View Answer Answer : B. Neon Description 48- Which gas is used to provide inert atmospheres in chemical reactions? A. OxygenB. HydrogenC. NitrogenD. Carbon dioxide View Answer Answer : C. Nitrogen Description 49- What is the chemical formula of ozone gas? A. O₂B. O₃C. O₄D. O₅ View Answer Answer : B. O₃ Description 50- Which of the following gases has a pungent smell? A. OxygenB. HydrogenC. NitrogenD. Ammonia View Answer Answer : D. Ammonia Description 51- Which gas is essential for human respiration? A. HeliumB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : B. Oxygen Description 52- Which gas is most abundant in the Earth's atmosphere? A. ArgonB. OxygenC. NitrogenD. Hydrogen View Answer Answer : C. Nitrogen Description 53- Which gas is commonly used in balloons because it is lighter than air? A. NeonB. HeliumC. OxygenD. Hydrogen View Answer Answer : B. Helium Description 54- Which gas is responsible for the greenhouse effect? A. ArgonB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 55- Which gas is used to disinfect drinking water? A. ChlorineB. NitrogenC. OxygenD. Hydrogen View Answer Answer : A. Chlorine Description 56- Which gas is produced during respiration? A. OxygenB. HeliumC. NitrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 57- What gas do plants absorb from the air for photosynthesis? A. ArgonB. Carbon dioxideC. OxygenD. Nitrogen View Answer Answer : B. Carbon dioxide Description 58- Which gas is commonly used in fire extinguishers? A. OxygenB. NitrogenC. Carbon dioxideD. Hydrogen View Answer Answer : C. Carbon dioxide Description 59- Which gas is used in electric bulbs? A. ArgonB. OxygenC. HydrogenD. Carbon dioxide View Answer Answer : A. Argon Description 60- Which gas is used in welding? A. NeonB. HeliumC. OxygenD. Chlorine View Answer Answer : C. Oxygen Description 1 2 3 4 5 6 7 8
