AQA Chemistry C5 part A

What is the definition of a metal ore?

• Any rock that contains a metal.

• A rock from which it is economical to extract a metal.

• A pure metal found in the ground.

• A compound containing a metal and oxygen.

In the context of extracting metals from their oxides, what is reduction?

• The removal of oxygen from a compound.

• The addition of oxygen to a compound.

• The reaction of a metal with water.

• The melting of a metal oxide.

What is the purpose of the reactivity series?

• To list metals in order of their melting points.

• To list metals in order of their density.

• To list metals in order of their reactivity.

• To list metals in alphabetical order.

When a metal from Group 1, like potassium, reacts with water, what are the products?

• A metal oxide and hydrogen.

• A metal hydroxide and hydrogen.

• A metal carbonate and water.

• A salt and water.

What is the trend in reactivity of the alkali metals as you go down Group 1?

• The reactivity decreases.

• The reactivity stays the same.

• The reactivity increases.

• The reactivity increases and then decreases.

What gas is produced when a reactive metal like magnesium reacts with a dilute acid?

• Oxygen.

• Carbon dioxide.

• Chlorine.

• Hydrogen.

Why is it better to use dilute acid rather than water to compare the reactivity of metals like zinc and iron?

• Their reactions with water are very fast and dangerous.

• Their reactions with water are very slow and difficult to compare.

• They do not react with acid at all.

Why can aluminium be used for applications like window frames, despite being quite high in the reactivity series?

• It is protected by a layer of aluminium oxide.

• It does not react with oxygen.

• It is less reactive than iron.

• It is very cheap to produce.

Based on the information in Table 1, which of these metals would react most vigorously with dilute acid?

• Iron.

• Lead.

• Calcium.

• Zinc.

When testing for the gas produced when a metal reacts with acid, what is the positive result for hydrogen?

• It relights a glowing spill.

• It turns limewater cloudy.

• It makes a 'pop' with a lighted spill.

• It turns damp litmus paper red.