Grade 9Sciencequiz16 questions

Metals and the reactivity series

Grade 9: order of reactivity (potassium to gold), metals with acids give hydrogen, displacement reactions, rusting, extracting metals.

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Questions

Which of these metals is the most reactive?
- Copper
- Iron
- Magnesium
- Potassium
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Potassium
Which metal is the least reactive?
- Aluminium
- Gold
- Sodium
- Zinc
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Gold
Which list is in order from most reactive to least reactive?
- Copper, zinc, magnesium, sodium
- Magnesium, copper, sodium, zinc
- Sodium, magnesium, zinc, copper
- Zinc, sodium, copper, magnesium
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Sodium, magnesium, zinc, copper
Which gas is made when magnesium reacts with dilute hydrochloric acid?
- Carbon dioxide
- Chlorine
- Hydrogen
- Oxygen
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Hydrogen
Which test shows hydrogen gas is present?
- A glowing splint relights
- A lit splint makes a squeaky pop
- Damp litmus paper turns white
- Limewater turns cloudy
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A lit splint makes a squeaky pop
Copper reacts quickly with dilute hydrochloric acid to give hydrogen. (True or false?)
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False
Zinc is added to copper sulfate solution. What happens?
- Copper displaces zinc
- Hydrogen gas is made
- Nothing happens
- Zinc displaces copper
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Zinc displaces copper
A more reactive metal can displace a less reactive metal from its compound. (True or false?)
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True
Will iron displace magnesium from magnesium sulfate solution? Yes or no? (Answer out loud)
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No, because iron is less reactive than magnesium
Which two things are needed for iron to rust?
- Hydrogen and salt
- Nitrogen and water
- Oxygen and carbon dioxide
- Oxygen and water
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Oxygen and water
Which method does NOT help to prevent iron from rusting?
- Coating it with oil
- Galvanising it with zinc
- Leaving it in damp air
- Painting it
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Leaving it in damp air
Rusting is a chemical change that makes a new substance. (True or false?)
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True
Which metal at the very bottom of the reactivity series is often found uncombined? (Answer out loud)
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Gold
How is iron extracted from its ore in a blast furnace?
- Adding the ore to acid
- Cooling the ore with water
- Heating the ore with carbon (coke)
- Mixing the ore with sodium chloride
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Heating the ore with carbon (coke)
Why is aluminium not extracted by heating its ore with carbon? (Answer out loud)
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It is more reactive than carbon (electrolysis is used)
Which method is used to extract very reactive metals such as aluminium?
- Distillation
- Electrolysis
- Evaporation
- Filtration
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Electrolysis

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