Reactivity of Metals

Which row shows the order of reactivity of the metals?

• A

• B

• C

• D

Aluminium reacts with iron (III) oxide, forming iron. The equation for this reaction is shown.

Which statement describes why this is a reduction and oxidation reaction.

• Aluminium gains oxygen and iron (III) oxide loses oxygen.

• Aluminium is reduced and iron (III) oxide is oxidised.

• Aluminium oxide is oxidised and iron is reduced.

• Iron gains oxygen and aluminium loses oxygen.

Five metals are reacted with cold water and with dilute hydrochloric acid. Some of the results are shown in the table.

What is the order of reactivity, from most to least reactive?

• Copper → calcium → magnesium → iron → sodium

• Copper → iron → magnesium → calcium → sodium

• Sodium → calcium → magnesium → iron → copper

• Sodium → iron → magnesium → calcium → copper

The table shows physical properties of some substances.

Which substance is a metal?

• A

• B

• C

• D

A cup is made of copper.

Why is copper not used for hot drinks?

• Copper is a good conductor of heat.

• Copper is a good electrical conductor.

• Copper is brightly coloured.

• Copper reacts with saliva.

A metal reacts with cold water. What is produced in the reaction?

• A metal hydroxide and hydrogen

• A metal oxide and hydrogen

• A metal hydroxide

• A metal oxide

Zinc metal displaces copper when it is to a solution of copper (II) sulphate according to the reaction below.

Zn_(s) + CuSO_4(aq) → ZnSO_4(aq) + Cu_(s)

Which statement best describes the changes taking place?

• Zinc metal is oxidised and copper ions are reduced.

• Zinc metal is reduced and copper ions are oxidised.

• Copper metal is oxidised and zinc ions are reduced.

• Copper metal is reduced and zinc ions are oxidised.

Which TWO statements describe the changes during a displacement reaction?

A displacement reaction will occur because...

• the less reactive metal ion gains electrons and the more reactive metal atom loses electrons.

• the more reactive metal ion gains electrons and the less reactive metal atom loses electrons.

• The less reactive metal ion is reduced and more the reactive metal atom is oxidised.

• The more reactive metal ion is reduced and the less reactive metal atom is oxidised.

When metal reacts with liquid water the products are...

• metal hydroxide and oxygen gas
• metal hydroxide and hydrogen gas
• metal oxide and oxygen gas
• metal oxide and hydrogen gas

What is the correct equation when potassium reacts with water?

• 2K (s) + H₂O (l) -->  KOH (aq) + H₂ (g)
• K (s) + 2H₂O (l) -->  KOH (aq) + 2H₂ (g)
• 2K (s) + 2H₂O (l) -->  2KOH (aq) + H₂ (g)
• K (s) + H₂O (l) -->  KOH (aq) + H₂ (g)

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