Redox

Pini Par
Quiz by Pini Par, updated more than 1 year ago
Pini Par
Created by Pini Par almost 7 years ago
34
2

Description

Edexcel AS Chemistry Unit 2 - Redox Quiz

Resource summary

Question 1

Question
What does redox stand for?
Answer
  • OIL RIG
  • Reduction & Oxidation

Question 2

Question
Reduction & oxidation CAN take place on their own?
Answer
  • True
  • False

Question 3

Question
Oxidation occurs when a species loses one or more electrons
Answer
  • True
  • False

Question 4

Question
Reduction occurs when a species gains one or more electrons
Answer
  • True
  • False

Question 5

Question
What is the equation for the combustion of magnesium in oxygen? Is it an reduction or oxidation reaction?
Answer
  • Mg + 1/202 = MgO Reduction reaction
  • Mg + O2 = MgO Oxidation reaction
  • Mg +1/202 = MgO Oxidation reaction
  • 2Mg + O2 = 2Mgo Reduction reaction

Question 6

Question
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
Answer
  • True
  • False

Question 7

Question
A reducing agent reduces another species by taking one or more electrons from it.
Answer
  • True
  • False

Question 8

Question
Which one is the correct ionic half equation for the oxidation of Fe^2+ ions.
Answer
  • Fe^2+ (aq) = Fe^3+ (aq) + e^-
  • Fe^2+ = Fe^2+ + 2e^-

Question 9

Question
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?
Answer
  • MnO4^- = Mn^2+ +3e^-
  • MnO4^-(aq) + 8H^+ (aq) = Mn^2+(aq) + 4H2O (l)
  • MnO4^- (aq) + 8H^+ (aq) + 5^e- = Mn^2+ (aq) + 4H20 (l)

Question 10

Question
In acid solution, ferrate (VI) ions, FeO4^2- can be reduced to Fe^2+ ions. Which of the following equations shows this?
Answer
  • FeO4^2- (aq) + 8H+ (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l)
  • FeO4^2- (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l) + 4e^-
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