Pre-test Metals

Metals are elements that have many similar properties because of their structure. Which statement about metals is correct?

• Metals are malleable because the layers of atoms can slide over each other

• Metals conduct electricity because their ions vibrate and pass on energy to each other

• The melting point of metals depends on the strength of the intermolecular forces in the lattice

• To from an alloy of two metals, the metals must have very similar ionic radii

Metals have high melting points. What is the reason for this?

• Their atoms are joined by strong covalent bonds in a giant lattice

• They have strong forces of attraction between negative ions and delocalised electrons

• They have strong forces of attraction between negative ions and positive ions

• They have strong forces of attraction between position ions and delocalised electrons

• Aluminium is formed when aluminium oxide is heated

• Copper displaces zinc from aqueous zinc sulfate

• Copper is formed when copper (II) oxygen is heated with hydrogen

• When added to water, aluminium forms positive ions more readily than potassium forms positive ions

Aluminium is extracted from its ore using electrolysis. Which statement about the electrodes used is correct?

• The anode is made of graphite

• The anode is made of steel

• The cathode is made of bauxite

• The cathode is made of cryolite

Which diagram shows the structure of an alloy?

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Which element can only be extracted from its ore using electrolysis?

• Calcium

• Copper

• Lead

• Silver

The equations show reactions taking place in the blast furnace. In which reaction is an acidic impurity, present in iron ore, removed?

• C + O2 -> CO2

• C + CO2 -> 2CO

• Fe2O3 + 3CO -> 2Fe + 3CO2

• CaCO3 + SiO2 -> CaSiO3 + CO2

Which diagram correctly shows the conditions necessary for the rusting of iron and also the metal that can be used to prevent rusting by sacrificial protection?

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Aluminium is produced by the electrolysis of pure aluminium oxide. One of the electrodes in the process has to be replaced often. Which statement is correct?

• The product at the anode reacts with the anode

• The product at the anode reacts with the cathode

• The product at the cathode reacts with the anode

• The product at the cathode reacts with the cathode

Magnesium will react with aqueous copper (II) sulfate to form copper and aqueous magnesium sulfate. What is the correct equation for this reaction?

• Mg + CuSO4 -> Cu + MgSO4

• Mg + Cu2SO4 -> 2Cu + MgSO4

• 2Mg + CuSO4 -> Cu + Mg2SO4

• 2Mg + Cu2SO4 -> 2Cu + Mg2SO4