Quizizz Questions on Oxygen

What percentage of the air is oxygen?

• 78%

• 21%

• 1%

• 50%

Which of these is a property of oxygen?

• It is red in color

• It smells like flowers

• It has no taste, color, or smell

• It tastes sweet

What happens when you put a glowing splint into oxygen gas?

• It goes out

• It burns brighter

• It melts

• It freezes

What is the chemical formula for oxygen gas?

• CO₂

• H₂O

• O₂

• N₂

Oxygen is important for which of the following processes?

• Respiration and burning

• Freezing and melting

• Rusting only

• Making plastic

When preparing oxygen in the lab, which substance acts as a catalyst?

• Water

• Sand

• Manganese dioxide

• Salt

Which gas makes up the largest part of air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What is the test for oxygen gas called?

• The limewater test

• The glowing splint test

• The blue litmus test

• The popping sound test

Which of these is not a use of oxygen?

• Breathing

• Welding

• Filling balloons

• Fuel for cars

What safety equipment should you wear during the oxygen experiment?

• Helmet only

• Safety goggles and gloves

• Sunglasses

• No equipment is needed