CHEM 120 INTRODUCTION TO GENERAL
ORGANIC AND BIOLOGICAL CHEMISTRY
EXAM 3 ACTUAL EXAMINATION 2026
QUESTIONS WITH ANSWERS
⫸ What does GER stand for in redox chemistry? Answer: Gaining of
Electrons is Reduction.
⫸ Is Fe2+ oxidized or reduced when it becomes Fe0? Answer: Fe is
reduced.
⫸ Is O2- oxidized or reduced when it becomes O0? Answer: O is
oxidized.
⫸ Is Cu+1 oxidized or reduced when it becomes Cu2+? Answer: Cu is
oxidized.
⫸ What is an oxidizing agent? Answer: Contains the species being
reduced and oxidizes another species by accepting electrons.
⫸ What is a reducing agent? Answer: Contains the species being
oxidized and reduces another species by donating electrons.
⫸ What is the oxidizing agent in the reaction Cu2+ + Zn0 → Cu0 +
Zn2+? Answer: Cu2+ is the oxidizing agent.
, ⫸ What is the reducing agent in the reaction V4+ + Cu+ → Cu+5 + V0?
Answer: Cu+ is the reducing agent.
⫸ What are the oxidation numbers in the reaction 2 H2 + O2 → 2 H2O?
Answer: H is +1 and O is -2.
⫸ What is the reducing agent in the reaction 2 H2 + O2 → 2 H2O?
Answer: H2 is the reducing agent.
⫸ What is the oxidizing agent in the reaction V + O2 → VO2? Answer:
O2 is the oxidizing agent.
⫸ What is an organic compound? Answer: A compound based on and
containing carbon atoms.
⫸ What is the golden rule of organic chemistry? Answer: Carbon makes
4 bonds.
⫸ What defines a hydrocarbon? Answer: Contains only hydrogen and
carbon atoms.
⫸ What are alkanes? Answer: Hydrocarbons that contain only single C-
C bonds.
ORGANIC AND BIOLOGICAL CHEMISTRY
EXAM 3 ACTUAL EXAMINATION 2026
QUESTIONS WITH ANSWERS
⫸ What does GER stand for in redox chemistry? Answer: Gaining of
Electrons is Reduction.
⫸ Is Fe2+ oxidized or reduced when it becomes Fe0? Answer: Fe is
reduced.
⫸ Is O2- oxidized or reduced when it becomes O0? Answer: O is
oxidized.
⫸ Is Cu+1 oxidized or reduced when it becomes Cu2+? Answer: Cu is
oxidized.
⫸ What is an oxidizing agent? Answer: Contains the species being
reduced and oxidizes another species by accepting electrons.
⫸ What is a reducing agent? Answer: Contains the species being
oxidized and reduces another species by donating electrons.
⫸ What is the oxidizing agent in the reaction Cu2+ + Zn0 → Cu0 +
Zn2+? Answer: Cu2+ is the oxidizing agent.
, ⫸ What is the reducing agent in the reaction V4+ + Cu+ → Cu+5 + V0?
Answer: Cu+ is the reducing agent.
⫸ What are the oxidation numbers in the reaction 2 H2 + O2 → 2 H2O?
Answer: H is +1 and O is -2.
⫸ What is the reducing agent in the reaction 2 H2 + O2 → 2 H2O?
Answer: H2 is the reducing agent.
⫸ What is the oxidizing agent in the reaction V + O2 → VO2? Answer:
O2 is the oxidizing agent.
⫸ What is an organic compound? Answer: A compound based on and
containing carbon atoms.
⫸ What is the golden rule of organic chemistry? Answer: Carbon makes
4 bonds.
⫸ What defines a hydrocarbon? Answer: Contains only hydrogen and
carbon atoms.
⫸ What are alkanes? Answer: Hydrocarbons that contain only single C-
C bonds.
