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Edexcel AS Chemistry Unit 2 - Redox Quiz

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Redox

Redox

Question 1 of 10

1

What does redox stand for?

Select one of the following:

  • OIL RIG

  • Reduction & Oxidation

Explanation

Question 2 of 10

1

Reduction & oxidation CAN take place on their own?

Select one of the following:

  • True
  • False

Explanation

Question 3 of 10

1

Oxidation occurs when a species loses one or more electrons

Select one of the following:

  • True
  • False

Explanation

Question 4 of 10

1

Reduction occurs when a species gains one or more electrons

Select one of the following:

  • True
  • False

Explanation

Question 5 of 10

1

What is the equation for the combustion of magnesium in oxygen?
Is it an reduction or oxidation reaction?

Select one of the following:

  • Mg + 1/202 = MgO
    Reduction reaction

  • Mg + O2 = MgO
    Oxidation reaction

  • Mg +1/202 = MgO
    Oxidation reaction

  • 2Mg + O2 = 2Mgo
    Reduction reaction

Explanation

Question 6 of 10

1

An oxidising agent is a species (atom, molecule or ion) that oxidises another species by removing one or more electrons.
When an oxidising agent reacts, it is itself reduced

Select one of the following:

  • True
  • False

Explanation

Question 7 of 10

1

A reducing agent reduces another species by taking one or more electrons from it.

Select one of the following:

  • True
  • False

Explanation

Question 8 of 10

1

Which one is the correct ionic half equation for the oxidation of Fe^2+ ions.

Select one of the following:

  • Fe^2+ (aq) = Fe^3+ (aq) + e^-

  • Fe^2+ = Fe^2+ + 2e^-

Explanation

Question 9 of 10

1

In the presence of dilute sulfuric acid, potassium manganate (VII) solution is a strong oxidising agent. The Manganese is reduced to MnO4^- ion is reduced to Mn^2+.
Which is the correct half-equation?

Select one of the following:

  • MnO4^- = Mn^2+ +3e^-

  • MnO4^-(aq) + 8H^+ (aq) = Mn^2+(aq) + 4H2O (l)

  • MnO4^- (aq) + 8H^+ (aq) + 5^e- = Mn^2+ (aq) + 4H20 (l)

Explanation

Question 10 of 10

1

In acid solution, ferrate (VI) ions, FeO4^2- can be reduced to Fe^2+ ions.
Which of the following equations shows this?

Select one of the following:

  • FeO4^2- (aq) + 8H+ (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l)

  • FeO4^2- (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l) + 4e^-

Explanation

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