AQA Chemical Changes

In the reactivity series which of the following is the most reactive element?

• Copper

• Zinc

• Calcium

• Potassium

In the following chemical reaction what will the products be?

Copper Sulfate + Iron -->

• Copper Sulfide + Iron

• Iron Sulfide + Copper

• Iron Sulfate + Copper

• Copper Sulfate + Iron

In a displacement reaction it is the ____________ reactive metal that is displaced from a compound?

• Least

• Most

• Shiniest

• Heaviest

Which of the following ions is produced when acids dissolve in water?

• H⁺

• H^-

• OH⁺

• OH^-

Which of the following ions is produced when alkalis dissolve in water?

• H⁺

• H^-

• OH^-

• OH⁺

How can we extract metals that are higher than Carbon in the reactivity series?

• Reduction reaction

• Electrolysis

• Phytomining

• Bioleaching

In the diagram, which electrode is the anode?

• Left

• Right

Which of the following is the best statement to describe what happens to ions during electrolysis?

• Positive Cations will move to the Negative Cathode.

• Positive Cations will move to the Positive Cathode.

• Negative Cations will move to the positive Cathode

• Negative Cations will move the negative Cathode

When an acid and alkali react together this is known as a ___________ reactiion.

• Combustion

• Displacement

• Neutralisation

• Endothermic

What are the products of a neutralisation reaction?

• Salt and Hydrogen

• Salt and Water

• Excess acid and Hydrogen

• Excess alkali and Oxygen