Redox Reactions Quiz

What does PbO undergo in the reaction with H2?

• Decomposition

• Neutralization

• Oxidation

• Reduction

In the reaction Zn + Zn2+ + 2e, what is Zn acting as?

• Oxidizing agent

• Neutral agent

• Catalyst

• Reducing agent

What happens to the oxidation number of Br2 in the reaction with I-?

• Increases

• Decreases

• Remains the same

• Becomes negative

Which reaction is an example of a non-redox reaction?

• 2HNO3 + MgO → Mg(NO3)2 + H2O

• 2Mg + O2 → 2MgO

• Cu + 2Ag+ → Cu2+ + 2Ag

• Zn + CuSO4 → Cu + ZnSO4

In the reaction 2Fe2+ + Cl2 → 2Fe3+ + 2Cl, what is Cl2 acting as?

• Catalyst

• Neutral agent

• Oxidizing agent

• Reducing agent

What is the product formed at the cathode during the electrolysis of KI?

• Iodine

• Potassium

• Oxygen

• Hydrogen

What is the oxidation state of sulfur in SO4-2?

• 0

• +4

• +6

• -2

In the electrolysis of ZnCl2, what is produced at the anode?

• Oxygen

• Hydrogen

• Chlorine

• Zinc

What is the half-equation for the reduction of Cu2+?

• Cu + 2e → Cu2+

• Cu2+ + 2e → Cu

• Cu → Cu2+ + 2e

• Cu2+ → Cu + 2e

What is the observation when HCl reacts with NaOH?

• Color change

• Gas bubbles

• Precipitate formation

• Formation of salt and water