Redox Reactions Practice Quiz 2

Which change is an oxidation?

• FeO to Fe₂O₃

• H₂O₂ to H₂O

• Fe₂O₃ to FeO

• H₂O to H₂

Is calcium oxidized or reduced in the following reaction?

2CaO--> 2Ca + O₂

• oxidized

• reduced

Which substance is reduced in the following reaction?

NaOH + Li --> LiOH + Na

• Li

• O

• Na

• H

In the reaction Zn + H₂O --> ZnO₂ + H₂

which element, if any, is oxidized?

• zinc

• oxygen

• hydrogen

• water

What substance is oxidized in the following reaction?

4Fe + 3O₂ --> 2Fe₂O₃

• Iron

• Oxygen

• Fluorine

• none of these elements were oxidized

Which of the following represents oxidation?

• Pb⁺⁴ → PbO

• Cl₂ → 2Cl^-

• Fe³⁺ → Fe²⁺

• Zn → ZnO

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which of the following represents reduction?

• C → CO

• Zn → Zn²⁺

• N₂ → H₃N

• H₂ → H₂O

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which statement is true:

Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons

• Mg²⁺ loses 2 electrons

• Mg loses 1 electron

• Mg loses 2 electrons

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-

• Pb⁴⁺ + 2e^- →Pb²⁺

• 2O^-2 →O₂ + 4e^-

• Fe + 3e^- →Fe³⁺

What is a correct half-reaction of this equation, Cu⁺+ Fe --> Fe³⁺+ Cu?

• Cu⁺ --> Cu

• Fe --> Fe³⁺

• 3Cu⁺ + 3e^- --> 3Cu

• Fe + 3e^- --> Fe³⁺

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7