1.Write a balanced equation to show how copper is extracted from copper oxide using carbon.
.
1 of 24
2.Using the reactivity series, how can you use it to tell which metals can be extracted from their ores using reduction with carbon?
Metals below carbon in the reactivity series can be extracted by reduction using carbon e.g. zinc, iron, tin, copper
2 of 24
3.Name two biological methods that can be used to extract metals from low-grade ores.
Bioleaching,phytoextraction
3 of 24
4.Give an advantage and a disadvantage of using bioleaching, rather than electrolysis, to extract metals.
Advantage=simpler and cheaper to operate and maintain. Disadvantage=slow process
4 of 24
5.What is a life-cycle assessment?
It looks at each stage of the life of a product
5 of 24
6.Name four factors that should be considered when drawing up a life cycle assessment for a product
Choice of material,manufacture, product use, disposal
6 of 24
7.Give two benefits of recycling.
Saves money, cuts down amount of rubbish that gets sent to landfill
7 of 24
8.What is the purpose of fractional distillation?
To separate the different compounds of a substance
8 of 24
9.Name three fractions of crude oil.
LPG, petrol, oil
9 of 24
10.Do longer or shorter hydrocarbons drain out near the bottom of the fractional distillation column?
Longer hydrocarbons
10 of 24
11.Why do long hydrocarbons have higher boiling points than short-chain hydrocarbons?
So they can turn into liquid quicker in order to drain out of the column early on before the shorter hydrocarbons
11 of 24
12.What happens to an alkane when it's cracked?
Cracking turns long alkane molecules into smaller alkane and alkene molecules
12 of 24
13.What types of molecules are produced by cracking?
Smaller alkane and alkene molecules (which are more useful)
13 of 24
14.Name the gases given out by volcanoes millions of years ago.
Carbon dioxide, steam, methane, ammonia
14 of 24
15.How was nitrogen gas originally put into the atmosphere?
It was formed by ammonia reacting with oxygen, and was released by denitrifying bacteria
15 of 24
16.What change in the early atmosphere allowed the complex organisms to evolve?
The build-up of oxygen in the atmosphere (ozone layer) allowed evolution of more complex organisms that made use of the oxygen
16 of 24
17.What causes the enhanced greenhouse effect?
If the concentration of greenhouse gases in the atmosphere increases
17 of 24
18.Give three ways that we can combat global warming.
Use less fossil fuels, be more energy efficient, increase research into new energy sources
18 of 24
19.Name a gas that contributes to the production of acid rain.
Sulfur dioxide
19 of 24
20.Give three problems associated with acid rain.
Kills plants and animals, causes photochemical smog, damages limestone buildings
20 of 24
21.Why is carbon monoxide bad for human health?
It can stop your blood from carrying oxygen around your body, which can lead to fainting
21 of 24
22.Name three different sources of water that can be made potable.
Lakes, rivers, aquifers
22 of 24
23.Name three processes that are used to make water potable.
Filtration, sedimentation, chlorination
23 of 24
24.Name three impurities that could be present in tap water and where they come from.
Nitrate residues come from excess fertiliser 'run-off' into rivers and lakes, lead compounds come from old lead pipes, pesticide residues come from spraying pesticides too near to rivers and lakes
24 of 24
Other cards in this set
Card 2
Front
2.Using the reactivity series, how can you use it to tell which metals can be extracted from their ores using reduction with carbon?
Back
Metals below carbon in the reactivity series can be extracted by reduction using carbon e.g. zinc, iron, tin, copper
Card 3
Front
3.Name two biological methods that can be used to extract metals from low-grade ores.
Back
Card 4
Front
4.Give an advantage and a disadvantage of using bioleaching, rather than electrolysis, to extract metals.
Comments
No comments have yet been made