Liquid Oxygen Quiz

What is the color of liquid oxygen?

• Red

• Blue

• Green

• Yellow

Why is liquid oxygen harder to find than liquid water?

• Oxygen molecules are not present in the atmosphere

• Oxygen molecules are strongly attracted to each other

• Oxygen molecules have weak attraction

• Oxygen molecules have high kinetic energy

What allows molecules in the gas phase to move away from each other?

• Pressure

• Molecular attraction

• Kinetic energy

• Temperature

What must change for a substance to change phase?

• Kinetic energy

• Molecular attraction

• Temperature

• Pressure

How do scientists produce liquid oxygen from air?

• By increasing the pressure of the air

• By adding water vapor to the air

• By separating oxygen molecules from the air

• By increasing the temperature of the air

What is the temperature required to turn oxygen gas into liquid?

• -100°C

• -150°C

• -183°C

• -200°C

What happens to the nitrogen in the third tank of the machine used to produce liquid oxygen?

• It condenses into a liquid

• It evaporates into a gas

• It reacts with the oxygen

• It remains in the liquid state

Which other substances are difficult to condense due to weak attraction?

• Carbon dioxide and water vapor

• Oxygen and carbon dioxide

• Hydrogen and methane

• Nitrogen and oxygen

What is the main factor that determines the phase of a substance?

• Kinetic energy

• Molecular attraction

• Molecular weight

• Atomic number

Why does liquid oxygen need to be extremely cold to change phase?

• Due to its weak molecular attraction

• Due to its low atomic number

• Due to its high kinetic energy

• Due to its high molecular weight