Redox Reactions Quiz

What is Oxidation?

• Gain of oxygen

• Loss of electrons

• Loss of hydrogen

• Increase in oxidation state

Real-World Example: Rust Formation

• 4Fe + 3O2 → 2Fe2O3

• Iron is oxidized (loses electrons)

• Oxygen is reduced (gains electrons)

• Results in rust (iron oxide)

What is Reduction?

• Loss of oxygen

• Gain of electrons

• Gain of hydrogen

• Decrease in oxidation state

Real-World Example: Photosynthesis

• 6CO2 + 6H2O → C6H12O6 + 6O2

• Carbon dioxide is reduced

• Water is oxidized

• Produces glucose and oxygen

Common Mistakes to Avoid

What is the process of a substance losing electrons called?

• Oxidation

• Neutralization

• Reduction

• Decomposition

Which of the following describes a reducing agent?

• It gains electrons

• It loses electrons

• It increases oxidation state

• It decreases oxidation state

What is the result of a redox reaction?

• Transfer of electrons

• Formation of ionic bonds

• Transfer of protons

• Change in temperature

What is the role of an oxidizing agent in a redox reaction?

• It loses electrons

• It increases temperature

• It gains electrons

• It decreases oxidation state

Which of the following is a characteristic of a redox reaction?

• Involves transfer of electrons

• Involves only ionic compounds

• Only occurs in acidic solutions

• Does not involve energy changes