Oxygen and Its Reactions

This video explores the properties of oxygen, its role in the Earth's atmosphere, and its importance in human respiration. Oxygen is a colorless, odorless gas that makes up 21% of the atmosphere and is crucial for life. It reacts with metals to form oxides, leading to corrosion, which can be both beneficial and harmful. The video also discusses the lab production of oxygen and the hypothetical impact of increased atmospheric oxygen levels.

What is the atomic number of oxygen?

• 8

• 7

• 6

• 9

Which group in the periodic table does oxygen belong to?

• Group 15

• Group 17

• Group 14

• Group 16

What percentage of Earth's atmosphere is made up of oxygen?

• 19%

• 21%

• 23%

• 25%

During respiration, what does oxygen combine with to release energy?

• Vitamins

• Fats

• Proteins

• Glucose

What is the main byproduct of respiration that is exhaled?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Hydrogen

What is the process called when oxygen reacts with metals to form metal oxides?

• Condensation

• Sublimation

• Reduction

• Oxidation

Which metal forms a protective oxide layer that prevents further corrosion?

• Aluminium

• Copper

• Iron

• Zinc

What is the common name for iron (III) oxide?

• Verdigris

• Tarnish

• Rust

• Patina

How can oxygen be produced in a laboratory setting?

• Photosynthesis

• Decomposition of hydrogen peroxide

• Combustion of methane

• Electrolysis of water

What would happen if Earth's atmosphere had 30% oxygen instead of 21%?

• More stable climate

• Increased plant growth

• Uncontrollable forest fires

• Higher sea levels