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Worksheet: Redox Reactions

Q1:

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

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

Q2:

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

  • ASublimation
  • BOxidation
  • CTransference
  • DReduction
  • ENeutralization

Q3:

Which of the following statements is true?

  • AAcid-base reactions always involve two different species.
  • BReduction-oxidation reactions always produce at least two different species.
  • CAcid-base reactions always produce water.
  • DHydrogen ions can never act as a reducing agent.
  • EMolecular oxygen can never act as a reducing agent.

Q4:

Which of the following is a substrate that is oxidized?

  • AAnionic species
  • BCationic species
  • CNeutral species
  • DReducing agent
  • EOxidizing agent

Q5:

Which of the following is a substrate that is reduced?

  • ACationic species
  • BReducing agent
  • CAnionic species
  • DOxidizing agent
  • ENeutral species

Q6:

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

  • ATransference
  • BReduction
  • CSublimation
  • DOxidation
  • ENeutralization

Q7:

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

  • AReduced
  • BOxidized

Q8:

Which of the following half-equations describes an oxidation?

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

Q9:

Which of the following half-equations describes a reduction?

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

Q10:

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

  • AOxidized
  • BReduced