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- 1. Multiple ChoiceHow are metal oxides formed?When metals react with oxide.When metals react with water.When metals react with air.When metals react with oxygen.
- 2. Multiple ChoiceWhich of the following is the product of the reaction of aluminium and oxygen?aluminium oxide.metal oxidealuminium orealuminium and oxygen
- 3. Multiple ChoiceAluminium ore is also known ashaematitebauxiteorerock
- 4. Multiple ChoiceWhich of the following reactions produces calcium oxide?calcium and oxidecalcium and watercalcium and aircalcium and oxygen
- 5. Multiple ChoiceWhich of the following defines oxidation?A chemical reaction where a substance gains oxygen.A chemical reaction where a substance loses oxygen.A chemical reaction where a substance loses a metal.A chemical reaction where a substance gains a metal.
- 6. Multiple ChoiceWhich of the following is an example of an oxidation reaction?Ca + O2 --> CaONa2O + H2O --> NaOHFe2O3 + CO --> Fe + CO2All of the choices are oxidation reactions.
- 7. Multiple ChoiceWhich of the following is an example of an reduction reaction?Ca + O2 --> CaONa + O2 --> Na2OFe2O3 + CO --> Fe + CO2All of the choices are reduction reactions.
- 8. Multiple ChoiceThe rusting of iron is an example ofa reduction reaction.an oxidation reaction.a reaction of iron with water.a reaction that dissolves iron.
- 9. Multiple ChoiceWhen metals are extracted from ores, a __________ reaction is used.oxidation.reduction.extractionmining
- 10. Multiple ChoiceThe process of extracting ores from the ground is calledextraction.mining.reduction.oxidation.
- Answer choicesTagsAnswer choicesTags