Quiz
Redox
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Perguntas do quiz (10)
1What does redox stand for?
- AOIL RIG
- BReduction & Oxidation
2Reduction & oxidation CAN take place on their own?
- AVerdadeiro
- BFalso
3Oxidation occurs when a species loses one or more electrons
- AVerdadeiro
- BFalso
4Reduction occurs when a species gains one or more electrons
- AVerdadeiro
- BFalso
5What is the equation for the combustion of magnesium in oxygen?
Is it an reduction or oxidation reaction?- AMg + 1/202 = MgO
Reduction reaction - BMg + O2 = MgO
Oxidation reaction - CMg +1/202 = MgO
Oxidation reaction - D2Mg + O2 = 2Mgo
Reduction reaction
- AMg + 1/202 = MgO
6An 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- AVerdadeiro
- BFalso
7A reducing agent reduces another species by taking one or more electrons from it.
- AVerdadeiro
- BFalso
8Which one is the correct ionic half equation for the oxidation of Fe^2+ ions.
- AFe^2+ (aq) = Fe^3+ (aq) + e^-
- BFe^2+ = Fe^2+ + 2e^-
9In 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?- AMnO4^- = Mn^2+ +3e^-
- BMnO4^-(aq) + 8H^+ (aq) = Mn^2+(aq) + 4H2O (l)
- CMnO4^- (aq) + 8H^+ (aq) + 5^e- = Mn^2+ (aq) + 4H20 (l)
10In acid solution, ferrate (VI) ions, FeO4^2- can be reduced to Fe^2+ ions.
Which of the following equations shows this?- AFeO4^2- (aq) + 8H+ (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l)
- BFeO4^2- (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l) + 4e^-
- AFeO4^2- (aq) + 8H+ (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l)
Informações
- Descrição
- Edexcel AS Chemistry Unit 2 - Redox Quiz
- Autor
- Pini Par
- Idioma
- English
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