Which list matches the order at the top of the reactivity series?
Potassium, sodium, calcium, magnesium
Sodium, potassium, calcium, magnesium
Magnesium, calcium, sodium, potassium
What are the products of the reaction of sodium with water?
Sodium hydroxide and carbon dioxide
Sodium hydroxide only
Sodium hydroxide and hydrogen
What do you expect to see when calcium is added to cold water?
Bubbling
No visible change
Red flame
What do you expect to see when magnesium is added to dilute acid?
Rapid bubbling
Slow bubbling
What is the correct formula for hydrochloric acid?
HCl2
HCl
Hcl
Which of the following pairs of substances will react?
Magnesium and copper(II) nitrate solution
Copper and magnesium nitrate solution
Iron and magnesium nitrate solution
What change is observed when a piece of iron is added to copper(II) sulfate solution?
No change is observed
The blue colour of the solution fades and a black solid forms
Magnesium is above carbon in the reactivity series. What method could be used to extract magnesium from its ore?
Reduction with carbon
Oxidation with carbon
Electrolysis
Zinc can be extracted from zinc by heating with carbon. What happens in the reaction?
Zinc oxide is oxidised
Zinc oxide is reduced
Carbon is reduced
What is the name of the process in which plants are used to remove toxic metals from the soil?
Bioleaching
Bioextraction
Phytoextraction