1) Rusting process happen when present of a) Iron, Carbon, Water b) Oxygen and Water c) Iron, Water, Oxygen d) Iron, copper，magenesium 2) Iron (Fe) undergoes oxidation process a) True b) False 3) Oxygen is reducing agent because of addition of oxygen a) True b) False 4) Further oxidation and decompose of rust is a) Iron (II) hydroxide b) Hydrated Iron (III) Oxide c) Iron (III) hydroxide 5) What happen when iron expose to higher humidity? a) Rusting process slower  b) Rusting process faster c) Rusting do not occur 6) Which of the ways to prevent rusting from happening at the playground? a) Expose playground equipment to a place of high humidity b) Do not coating or painting the playground equipment c) Using suitable plastic materials for making the playground equipment

Rusting process

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