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This quiz contains 8 questions from a mix of 1 subtopics.

Illustration of the letter E symbolising electron in the context of reduction.

With respect to electrons, reduction is:

The gain of electrons

The loss of electrons

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Which of these reactions is an example of oxidation?

Ca2+  ➔  Ca  +  2e-

Ca2+  +  2e-  ➔  Ca

Ca  ➔  Ca2+  +  2e-

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Illustration of a metal reacting with acid in a beaker, showing a redox reaction with bubbles forming.

When a metal reacts with an acid, a redox reaction takes place.


The metal ions lose electrons, so we say they've been .


The hydrogen ions from the acid gain electrons, so we say they've been .

oxidised
reduced

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Sodium reacts with iron sulphate. 


Select the two half equations involved in this process.

Na  ➔  Na+  +  e-

Fe2+ + 2e-  ➔ Fe

Na+ + e- ➔ Na  

Fe  ➔ Fe2+ + 2e-

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Select the ion being oxidised in the following ionic equation:


2Li  +  Zn2+  ➔  2Li+  +  Zn

Lithium

Zinc

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Diagram showing a species being oxidised and another species being reduced.

Reduction and oxidation rarely happen on their own.

Usually a reaction involves one species being reduced, and another being oxidised.

(a 'species' just means atom / ion / molecule)


What do we call these reactions? 

Addition reaction

Redox

Oxiduction

Thermal decomposition

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Select the spectator ion present in the following equation:


2K  +  CuCl2  ➔  2KCl  +  Cu

Potassium

Chloride

Copper

Carbon

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CuSO4 + Mg ➔ MgSO4 + Cu


Which of the following statements is true about the reaction of copper(II) sulfate with magnesium?


Copper ions are oxidised

Magnesium atoms are reduced

Magnesium atoms are oxidised

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