AQA GCSE Chemistry Exam Unit 1 (C1) 15th June 2012 (OLD SPEC) AQA

About the copper and method... i put Reduction, it sparked controversy in my school.some are saying that its thermal decomposition some electrolysis and some even distillation.

There was a questiona bout what enviromental impact does nitrogen,co2 etc cause.... i wrote Global Dimming. is that correct?

Aah yes, that seemed like GCSE geography, so just used my knowledge from there. It wrinkled because as it cooled the molten rock solidified and since it cooled at different rates it became wrinkled

For the question on the number of elements in CaCO₃, I think the answer is 3.

For the question on how the tectonic plates move:
Radioactive decay in the mantle produces heat
This makes the mantle flow in convection currents
Therefore the plates move a few centimetres per year, forming mountains.

For the last question on milk bags Vs milk bottles I think part of the answer would be:
75% less poly(ethene) used results in less crude oil used up. Therefore less C0₂ gets released and there is less global warming and climate change.

Used bottles/bags dumped=More waste sent to landfill



This exam had fewer questions and more depth. Most questions were still easy though.

I found that really tough cuz the questions were weird. Most people at my school found it hard but hate when people come on here to show off they found it easy:L if you found it easy, why compare answers with others :LWhat did you guys put for why biodiesel can't be used in cars and why replacing it with petroleum was worse?

You could be right but I havnt seen exams where 100 ums is more than 37 other than earlier papers like 2007

I hope I'm wrong :L

loads of people seemed to have put 66% instead of 56% difference in the B100 particulates question

I am pretty sure that it is 56...

I apolgosise if you have a problem with people helping others :L
it wasn't used in cars because it would take too long at fuel stations, not sure what you mean by the other question

I put biodiesel produces impure diesel for the first page.. and i put colours for chromatography question are similar so they are not harmful, calcium oxide and carbon dioxide for elements, for polymers i put the milk bottles are not as good as milk bags as milk bags contain less polyethene which is linked to crude oil, non rewenable... and some other bull. I felt the paper was hideous and totally irrelevant as there was nothing on hydrogenation, early atmosphere or vegetable oils. Is what i put down O.K?

The disadvantage of biodiesel as a fuel, yeah i didn't like the chromotagrophy question. I said other things like a disadvantage for both of them and an advantage then a conclusion which was that point i mentioned to you, thanks

i put it is oxidised and carbon melts.. not sure, displaces it or whatever, really not sure,lol. What do you think physics will be like?

What happens to iron in blast furnace with oxygen blown in to remove carbon?

Oxygen reacts with carbon to form co2. Leaving iron

(this was a 2 mark question anyone else know what to put for second mark, or do you reckon thats right???)