Displacement reactions/redox/electron transfer

The formula of copper II oxide is....

• Cu2O

• CuO

• CuO2

• Cu2O2

Reactions between metals and metal oxides are often called......

• Competition reactions

• Combustion reactions

• Corrosion reactions

• Complex reactions

What colour is MgO

• Black

• Silver

• White

• Blue

What is the mixing compound in the reaction below

Mg + ? = MgO + Cu

• copper oxide

• carbon dioxide

• copper

• carbon

Why is the reaction between magnesium and copper oxide known as the thermite reaction?

• It is a displacement reaction

• Magnesium is less reactive than copper

• It releases heat

• It forms copper

Why is carbon included in the reactivity series?

• It is more reactive than copper

• It acts as a metal

• It is used to extract metals

• It conducts electricity

Oxidation is the .........

• Gain of electrons

• Gain of ions

• Loss of oxygen

• Gain of oxygen

A reaction where oxidation and reduction happens is a....

• replacement reaction

• displacement reaction

• redox reaction

• competition reaction

An oxidising agent is one that......

• Gets oxidised

• Oxidises something else

• Does not get reduced

• Acts as the reducing agent

Can a reducing agent also be oxidised too?

• Sometimes

• Never

• Rarely

• Always