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AQA GCSE CHEMISTRY Unit 1 Question Game!

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Reply 20
Original post by MaxHSloan
Does anyone know if we need to know the catalyst for reacting steam with ethene?


I'm pretty sure we don't need to know
Reply 21
What are the products of incomplete combustion?
Reply 22
Original post by Jamie Vardy
How is air separated into gases?

Fractional distillation of air.

Gases in the air have different boiling points so can be separated from the air. The air is cooled to below -200 degrees celsius and fed into the column. Nitrogen is separated from oxygen and argon . Further distillation can be done to separate oxygen from argon in their pure form.
Needs to be separated to below -200 degrees celsius because boiling points of nitrogen is 195 and -183 is oxygen and -185 is argon.
Reply 23
Original post by IAmAnTroll
What are the two ways ethanol can be produced?


1. Fermentation of ethene
2. Hydration of ethene
What proof is there that our continents were once all joined together?
Reply 25
Original post by Adamtoo
What are the products of incomplete combustion?


Carbon monoxide
FULL ANSWER:
1. Air is filtered to remove the dust.
2. The air is cooled to -200 degrees celsius..
3. The water vapour condenses and is removed.
4. The CO2 (should be a small 2) freezes and is removed.
5. The liquefied air enters the column and is heated slowly.
6. The remaining gases are separated by fractional distillation.
7. Argon and oxygen have similar boiling points and so come out together; they are therefore separated using another column.
Original post by 4dam
Carbon monoxide


Are you good at chem? If so please could we go through some things, soo stuck for tomorrow
Reply 28
Original post by MaxHSloan
What proof is there that our continents were once all joined together?


Continental drift theory, continents fit together like jigsaw puzzle and similar fossils found on opposite side of the Atlantic ocean
Reply 29
Original post by EmmanuellaUwaifo
Are you good at chem? If so please could we go through some things, soo stuck for tomorrow


Dunno how good I am, what do you want to go through, I may need the help too.
Reply 30
Original post by MaxHSloan
What proof is there that our continents were once all joined together?


The similarities between the fossils and animals on in the borders of one continent to another. Also, the similarities in the shape of the continents that fit in almost like a "jigsaw".
What can be added to a polymer to make it biodegradable?
Reply 32
Through thermal decomposition, hydrocarbons are passed over a catalyst.
Reply 33
Original post by Charlie223
What can be added to a polymer to make it biodegradable?


Cornstarch
Reply 34
60°C and a Nickel Catalyst
Original post by 4dam
Dunno how good I am, what do you want to go through, I may need the help too.


Well...
The metals topic, I feel like if I get a question on that tomorrow I will not know how to answer it.
Ethanol and Crude oils
and the gases in the atmosphere topic
:/ Sorry
Is there anything you dont understand
Reply 36
What will happen if we release a bunch of drunk rats and male mosquitoes into the atmosphere?
Reply 37
What are the advantages and disadvantages of bioleaching and phytomining?
Original post by 2gee
60°C and a Nickel Catalyst


Describe the Miller-Urey experiment,
. Must give gasses used
. Condition the gasses were in
. What was made and why there was a problem.
Reply 39
Original post by EmmanuellaUwaifo
Well...
The metals topic, I feel like if I get a question on that tomorrow I will not know how to answer it.
Ethanol and Crude oils
and the gases in the atmosphere topic
:/ Sorry
Is there anything you don't understand


Nope, I'm happy with them, is there anything specific you don't understand or just a specific thing?

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