GCSE 2.1 Reactivity of Metals

Which method is used to extract aluminium, a reactive metal, from its ore?

• Chemical reduction

• Electrolysis

• Displacement reaction

• Phytomining

What is the purpose of adding acid to the ash in the phytomining process?

• To neutralize the ash

• To produce a solution containing dissolved metal compounds

• To burn the ash further

• To solidify the metal compounds

Which of the following is NOT a step in the phytomining process?

• Plants absorb metal compounds

• Plants are harvested and burned to produce ash

• Metal is extracted by traditional mining methods

• Copper is obtained by displacement using scrap iron

Which metal is the most reactive according to the reactivity series?

• Copper

• Iron

• Potassium

• Zinc

What color flame does potassium produce when it burns in air?

• Yellow

• Lilac

• Brick red

• Bright white

Which metal burns with a yellow/orange flame producing a white solid?

• Potassium

• Sodium

• Calcium

• Magnesium

What is the product formed when magnesium burns in air?

• Magnesium oxide

• Magnesium hydroxide

• Magnesium carbonate

• Magnesium sulfate

Which metal burns with a brick red flame producing a white solid?

• Potassium

• Sodium

• Calcium

• Magnesium

What color does zinc glow when it reacts with oxygen?

• Blue

• Green

• Yellow

• Red

What is the black solid produced when iron filings burn with orange sparks?

• FeO

• Fe2O3

• Fe3O4

• Fe(OH)3