1) What word is used to describe a reaction when a substance reacts with oxygen? a) Thermal decomposition b) Oxidation c) Electrolysis 2) What compound is made when sodium reacts with oxygen? a) Sodium oxide b) Oxygen sodide c) Sodium hydroxide 3) What is the correct word equation for the combustion of carbon? a) Carbon + oxygen → carbon dioxide b) Carbon + oxygen = carbon dioxide c) Carbon dioxide → carbon + oxygen d) Carbon → carbon dioxide 4) What compound is made when calcium is oxidised? a) Calcium oxide b) Calcium hydroxide c) Calcium carbide 5) What compound is produced when hydrogen is oxidised? a) Hydrogen iodide b) Oxygen hydride c) Water (H₂O) 6) What is the correct symbol equation for the reaction of magnesium with oxygen? a) Mg + O = MgO b) Mg + O₂ → MgO c) MgO → Mg + O 7) What word is used to describe an oxidation reaction of a fuel which releases useful energy? a) Reduction b) Displacement c) Combustion 8) What is an unusual risk associated with the oxidation of magnesium? a) Lots of smoke b) Large flame c) Bright light

Oxidation

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