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AQA Science (GCSE) questions

Okay, so to help people revise, I thought I'd post 20 questions every day, just so you can see where you are. It also helps me revise :tongue:
Basically, what I thought this could be was like a question exchange thing. People post difficult questions and other answer them and post their own questions? xD
Anyways, so these ones are all from C1.

1) Describe the limestone cycle, including all of its reactions
2) What is the chemical formula of limestone?
3) How do you make a) cement from limestone and b) concrete from cement?
4) What is phytomining?
5) What is bioleaching?
6) In terms of the reactivity series, describe which metals carbon can and can't extract.
7) What is an ore?
8) How is carbon monoxide produced?
9) What is the general formula of an alkane?
10) Describe the fractional distillation of crude oil
11) What is a biofuel?
12) What is the most common by-product of cracking long chain hydrocarbons?
13) What environmental problems do particulates cause?
14) Why is it hard to dispose of polymers?
15) Compare the two methods of producing ethanol.
16) Describe the conditions needed for hydrogenating an unsaturated fat.
17) How do emulsifiers make an emulsion stable?
18) Describe the Miller-Urey experiment
19) Why is the so much less carbon dioxide in the atmosphere now than there was millions of years ago?

Last, hard question: 20) How can we reduce the amount of sulphur dioxide released into the atmosphere?
Reply 1
Avatar for Rubato
Rubato
14
Omg I've tried answering the questions twice and EVERYTIME I'm about to post my Internet shut :/
Original post by Manexopi
Omg I've tried answering the questions twice and EVERYTIME I'm about to post my Internet shut :/


Really? Jeez, it must really hate chemistry D:
Reply 3
Avatar for Rubato
Rubato
14
Original post by WanderingWorrier
Really? Jeez, it must really hate chemistry D:


Lol probably that or really long messages I'm on my Laggy IPod you see 8)
Original post by Manexopi
Lol probably that or really long messages I'm on my Laggy IPod you see 8)

Ahh, right xD

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