Developing a reactivity series for metals | Exit Quiz | Oak National Academy

What is the name of the reaction where a more reactive element will take the place of a less reactive element in a compound?

Answer explanation

A displacement reaction is where a more reactive element will take the place of a less reactive element in a compound.

Which of the following statements about the reaction shown are correct? calcium + iron sulfate → calcium sulfate + iron

• it is an example of a combustion reaction

• iron is more reactive than calcium

• calcium is more reactive than iron

• calcium displaces iron in the compound

• iron displaces calcium in the compound

Answer explanation

Calcium is more reactive than iron. The calcium displaces iron in the compound.

Why is potassium more reactive than iron?

• potassium more easily loses electrons to form negative ions

• potassium more easily gains electrons to form negative ions

• potassium more easily loses electrons to form positive ions

• potassium more easily gains electrons to form positive ions

Answer explanation

Potassium is more reactive than iron because potassium more easily loses electrons to form positive ions.

The non–metal carbon is positioned between which two metals in the reactivity series?

• aluminium

• sodium

• hydrogen

• zinc

• silver

Answer explanation

Carbon is positioned between aluminium and zinc in the reactivity series.

Which of the following substances are products of the reaction between zinc and hydrochloric acid?

• oxygen

• water

• hydrogen

• zinc hydroxide

• zinc chloride

Answer explanation

zinc + hydrochloric acid → zinc chloride + hydrogen

Which of the following substances are products of the reaction between lithium and water?

• lithium oxide

• lithium hydroxide

• lithum carbonate

• oxygen

• hydrogen

Answer explanation

lithium + water → lithium hydroxide + hydrogen