Oxidation and Reduction

________________ is the loss of oxygen atoms.

Is this an oxidation or reduction reaction?

water → hydrogen + oxygen

• Oxidation

• Reduction

Which element has been reduced?

• iron

• lithium

• oxide

• iron oxide

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which substance is reduced in the following reaction? 
NaOH + Li --> LiOH + Na

• Li

• Na

• O

• H

Tags

NGSS.HS-PS1-2

Which of the following statements refers to an oxidation process?

• Hydrogen is added to ethene

• Oxygen is removed from carbon dioxide

• Chlorine accepts electrons

• Increase in the oxidation number of magnesium metal

Which of these equations represents a redox reaction?

• Ca(HCO₃)_{2 -->} CaCO₃ + H₂O + CO₂

• CH₃COOH + NaOH --> CH₃COONa + H₂O

• Zn + 2FeCl₃ --> ZnCl₂ + 2FeCl₂

• NaCl + AgNO_{3 -->} AgCl + NaNO₃

Tags

NGSS.HS-PS1-7

A camera film is covered with silver ions that darkens upon exposure to light. The reaction that takes place is: Ag + e‾ → Ag. In this reaction, silver ion acts as ____________

• reducing agent.

• dissolving agent.

• analytical agent.

• oxidizing agent

The change of I^‾ to I₂ is ________________

• oxidation

• reduction

• neutralization

• Decomposition

• Combustion

Tags

NGSS.HS-PS1-2

The below reaction is an example of _________reaction.

F₂ → 2 F^- + 2 e^-

• Oxidation

• Reduction

• Neutralization

• decomposition

• combustion

What are the oxidation numbers of manganese in the manganese compounds shown below?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2