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Lesson: Redox Reactions

In this lesson, we will learn how to identify redox reactions and write ionic equations to describe electron transfer between oxidants and reductants.

Worksheet • 10 Questions

Q1:

Which of the following is not an oxidation-reduction reaction?

  • A 2 H C O C O + H C O 3 – 3 2 – 2 3
  • B 2 N O + H O H N O + H N O 2 2 3 2
  • C 3 B r F B r F + B r 3 2
  • D 2 H O 2 H O + O 2 2 2 2
  • E 4 H P O 3 H P O + P H 3 3 3 4 3

Q2:

What is the process of the gain of an electron called?

  • AReduction
  • BNeutralization
  • COxidation
  • DTransference
  • ESublimation

Q3:

Which of the following statements is true?

  • AHydrogen ions can never act as a reducing agent.
  • BMolecular oxygen can never act as a reducing agent.
  • CReduction-oxidation reactions always produce at least two different species.
  • DAcid-base reactions always produce water.
  • EAcid-base reactions always involve two different species.

Q4:

Which of the following is a substrate that is oxidized?

  • AReducing agent
  • BOxidizing agent
  • CCationic species
  • DNeutral species
  • EAnionic species

Q5:

Which of the following is a substrate that is reduced?

  • AOxidizing agent
  • BNeutral species
  • CReducing agent
  • DAnionic species
  • ECationic species

Q6:

What is the process of the loss of an electron called?

  • AOxidation
  • BNeutralization
  • CReduction
  • DSublimation
  • ETransference

Q7:

A piece of magnesium oxide is heated with hydrogen until the magnesium is recovered. Is the magnesium oxide being oxidized or reduced?

  • AOxidized
  • BReduced

Q8:

Which of the following half-equations describes an oxidation?

  • A F e F e + e 2 + 3 + –
  • B A l + 3 e A l 3 + –
  • C F e + 2 e F e 2 + –
  • D F + 2 e 2 F 2 – –
  • E C l + 2 e 2 C l 2 – –

Q9:

Which of the following half-equations describes a reduction?

  • A Z n + 2 e Z n 2 + –
  • B F e F e + 2 e 2 + –
  • C 2 O O + 2 e 2 – 2 –
  • D F e F e + e 2 + 3 + –
  • E 2 B r B r + 2 e – 2 –

Q10:

When a piece of magnesium oxide is heated with hydrogen, magnesium metal is produced. Is the hydrogen oxidized or reduced?

  • AReduced
  • BOxidized
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