Which of the following groups of three metals is arranged in order of increasing chemical reactivity?
Potassium, iron, lead
Gold, tin, sodium
Zinc, calcium, silver
Which of the following metals will react with water?
Lithium
Iron
Gold
How was the reactivity series made?
By comparing metals in different chemical reactions
By testing the hardness of different metals
By the position of metals in the periodic table
Which process cannot be used to separate iron from iron ore?
Electrolysis
Heating the ore with carbon monoxide
Heating the ore
Which of the following pairs of metals can only be extracted from their ores by electrolysis?
Copper and tin
Magnesium and iron
Potassium and aluminium
Which of these pairs of metals would produce the highest voltage in a cell?
Zinc and lead
Iron and nickel
Magnesium and silver
Which of the following is an example of chemical protection used to prevent iron objects rusting?
Painting
Galvanising
Tin-plating
What colour does ferroxyl indicator change to indicating that iron is beginning to rust?
Yellow
Red/orange
Blue
What name is given to a mixture of metals?
A compound
An alloy
A reaction
Which of the following is an alloy?
Copper
Zinc
Brass