Which of the following 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 a displacement reaction?
Lead and silver (I) nitrate solution
Silver and copper (II) sulphate solution
Magnesium and lithium sulphate solution
Which of the following groups of four metals is arranged in descending order of their chemical reactivity?
Potassium, magnesium, lead and iron
Sodium, aluminium, tin and gold
Calcium, zinc, aluminium and silver
When lithium reacts with water what two products are formed?
Lithium hydroxide and hydrogen
Lithium hydroxide and water
Lithium and hydrogen
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 type of reaction is happening in the equation below?
\[Cu_{}^{2 + }(aq) + 2e_{}^ - \to Cu(s)\]
Reduction
Oxidation
Redox
When iron is extracted from iron ore, it is heated with carbon monoxide. How can carbon monoxide be described in this process?
Catalyst
Reducing agent
Oxidising agent
How are metal elements able to conduct electricity?
Free moving ions
Free moving protons
Free moving electrons
Haematite \(F{e_2}{O_3}\) is an ore of iron.
Given the relative atomic mass of iron is 56 and oxygen is 16, calculate the percentage by mass of haematite that is iron.
35%
70%
87.50%
Gibbsite \(Al(O{H})_{3}\) is a mineral found in aluminium ore.
Given the relative atomic mass of aluminium is 27, oxygen is 16 and hydrogen is 1, calculate the percentage by mass of gibbsite that is aluminium.
20.50%
34.6%
61%