Properties of Gases and Air Composition

The video tutorial explains the composition of air, which includes nitrogen, oxygen, argon, carbon dioxide, and water vapor. It describes the process of separating these gases through liquefaction and fractional distillation. The air is first filtered to remove dust, then cooled to -200°C to liquefy. Water vapor and carbon dioxide are removed at specific temperatures. The liquefied gases are then separated by fractional distillation, with detailed steps provided.

What is the approximate percentage of nitrogen in the air?

• 0.93%

• 78.08%

• 0.04%

• 20.95%

Which process is used to separate nitrogen, argon, and oxygen from the air?

• Filtration

• Liquefaction and fractional distillation

• Sublimation

• Evaporation

At what temperature is air cooled to become a liquid?

• -79 degrees Celsius

• -196 degrees Celsius

• -183 degrees Celsius

• -200 degrees Celsius

At what temperature does oxygen liquefy?

• -196 degrees Celsius

• -186 degrees Celsius

• -183 degrees Celsius

• -79 degrees Celsius

Which gas liquefies at -186 degrees Celsius?

• Carbon Dioxide

• Nitrogen

• Oxygen

• Argon