Air Around Us_9

Which gas makes up approximately 78% of the air around us?

• Helium

• Nitrogen

• Carbon Dioxide

• Oxygen

Which gas is used to keep food fresh in packages for a longer time?

• Nitrogen

• Carbon Dioxide

• Oxygen

• Water Vapor

Which gas is used as a coolant and to store blood samples in hospitals?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Rare Gases

Which gas is required for burning and is used in welding and fuel burning in rockets?

• Carbon Dioxide

• Water Vapor

• Oxygen

• Nitrogen

Which gas do plants inhale from the air to carry out the process of photosynthesis?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Water Vapor

Which gas is used to create bubbles in soft drinks and in fire extinguishers?

• Rare Gases

• Oxygen

• Carbon Dioxide

• Nitrogen

Which gas is easily frozen into its solid form and is used to preserve food?

• Water Vapor

• Carbon Dioxide

• Oxygen

• Nitrogen

Which gas is used in colorful signboards and glows when electricity is passed through it?

• Nitrogen

• Neon

• Carbon Dioxide

• Oxygen

Which gas is used in mountain climbing and by astronauts where natural oxygen levels are low?

• Rare Gases

• Nitrogen

• Carbon Dioxide

• Oxygen

Which gas is used in the storage of explosives, in lightbulbs, and in dyes and medicines?

• Water Vapor

• Nitrogen

• Carbon Dioxide

• Oxygen