Redox Reactions Quiz

What is the primary focus of redox reactions?

• Synthesis of metals

• Formation of acids

• Electron transfer processes

• Combustion of fuels

Which of the following is a characteristic of oxidation?

• Addition of hydrogen

• Loss of hydrogen

• Reduction of electronegative elements

• Gain of electrons

What does the term 'reductant' refer to?

• A substance that gains electrons

• A substance that loses electrons

• A substance that is oxidized

• A substance that is reduced

In the reaction 2Mg + O2 → 2MgO, what is being oxidized?

• Magnesium

• Oxygen

• Magnesium oxide

• None of the above

What is the oxidation number of oxygen in most compounds?

• -1

• -2

• 0

• +1

Which of the following reactions is a redox reaction?

• CaCO3 → CaO + CO2

• NaCl → Na + Cl2

• H2 + Cl2 → 2HCl

• H2O → H2 + O2

What is the role of an oxidizing agent?

• To donate electrons

• To accept electrons

• To increase oxidation number

• To decrease oxidation number

In the reaction Zn + Cu2+ → Zn2+ + Cu, which species is reduced?

• Zinc

• None of the above

• Copper ion

• Copper metal

What type of reaction is represented by 2Na + Cl2 → 2NaCl?

• Combination

• Decomposition

• Displacement

• Redox

Which of the following is NOT a type of redox reaction?

• Neutralization reactions

• Displacement reactions

• Decomposition reactions

• Combination reactions