Gasses Mcqs 121- Which gas is used in lighted signs? A. NeonB. OxygenC. HeliumD. Nitrogen View Answer Answer : A. Neon Description 122- What gas causes rusting of iron when combined with water? A. NitrogenB. OxygenC. MethaneD. Carbon dioxide View Answer Answer : B. Oxygen Description 123- Which gas was used in World War I as a chemical weapon? A. OxygenB. ChlorineC. HydrogenD. Carbon dioxide View Answer Answer : B. Chlorine Description 124- Which gas is most soluble in water? A. NitrogenB. OxygenC. AmmoniaD. Carbon monoxide View Answer Answer : C. Ammonia Description 125- What is the function of noble gases in the atmosphere? A. Support lifeB. Remain inert and stableC. React with pollutantsD. Cause chemical reactions View Answer Answer : B. Remain inert and stable Description 126- Which gas is known as a reducing agent? A. HeliumB. OxygenC. NitrogenD. Carbon monoxide View Answer Answer : D. Carbon monoxide Description 127- Which gas is used in smoke detectors? A. ArgonB. HeliumC. Americium produces ionizing gas effectD. Nitrogen View Answer Answer : C. Americium produces ionizing gas effect Description 128- Which gas has the lowest density? A. HydrogenB. OxygenC. HeliumD. Carbon dioxide View Answer Answer : A. Hydrogen Description 129- Which gas is responsible for the choking smell in polluted air? A. HeliumB. NitrogenC. Sulphur dioxideD. Carbon monoxide View Answer Answer : C. Sulphur dioxide Description 130- Which gas is used in neon lights? A. XenonB. NeonC. HeliumD. Krypton View Answer Answer : B. Neon Description 131- Which gas was used in the Hindenburg airship disaster? A. HeliumB. HydrogenC. MethaneD. Carbon dioxide View Answer Answer : B. Hydrogen Description 132- Which gas is responsible for fog in the air? A. OxygenB. NitrogenC. Water vaporD. Carbon monoxide View Answer Answer : C. Water vapor Description 133- What gas is used to preserve food items? A. OxygenB. NitrogenC. HydrogenD. Sulphur dioxide View Answer Answer : B. Nitrogen Description 134- Which gas is heavier than air? A. HeliumB. OxygenC. HydrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 135- Which gas is used in laser technology? A. HeliumB. OxygenC. NitrogenD. Carbon dioxide View Answer Answer : D. Carbon dioxide Description 136- Which gas has anesthetic properties? A. HeliumB. OxygenC. Nitrous oxideD. Nitrogen View Answer Answer : C. Nitrous oxide Description 137- Which gas is used to measure the purity of milk? A. OxygenB. AmmoniaC. Carbon dioxideD. No specific gas, but lactometers use displacement of water/air View Answer Answer : D. No specific gas, but lactometers use displacement of water/air Description 138- What is the primary gas used in the formation of clouds? A. OxygenB. Water vaporC. NitrogenD. Carbon dioxide View Answer Answer : B. Water vapor Description 139- Which gas is least reactive? A. HeliumB. OxygenC. NitrogenD. Hydrogen View Answer Answer : A. Helium Description 140- Which gas can be used as a lifting gas but is explosive? A. NeonB. HeliumC. HydrogenD. Methane View Answer Answer : C. Hydrogen Description 1 2 3 4 5 6 7 8
