GCSE H Maths Non-Calc OCR unofficial mark scheme anyone?

I took OCR, and as far as I know there isn't really one at the moment. One of my maths teachers made an unofficial one by doing the solutions himself on an extra paper for the one we did

I would ask to see if one of my maths teachers could do one, but I'm on study leave and we're not supposed to go into school...

Before you go in for your exam or after you have an exam whilst you're still in school you may aswell go and ask a maths teacher, I'm not really supposed to be in school either because there aren't any lessons but we're still allowed to be in school for a little before/after the exam

Yeah, I'll have too. It seems hardly anyone took OCR for maths on this forum...

I know! I've been looking everywhere on the forum and can't find anything... how'd you find the paper anyway?

Surprisingly good! The topics that were covered were very generous (scatter graphs, cumulative frequency, surds). Hopefully calculator will be as generous...

Here you go:
Hope it helps all of you guys!
Question 1)


A)Electronic structure of carbon atom. 6 altogether, 2 on the inside, 4 on the outer shell.
(1 mark )




B) hydrogen + oxygen --------> water
(1 mark)


C) coal contains sulfur, oxygen, carbon....... Name products formed and effect on environment: (4marks)
Sulfur dioxide = acid rain = kills fish and plants
Carbon dioxide= global warming
Nitrogen oxides=acid rain
Carbon monoxide= soot and global dimming


2)a
ethene is formed by hydration. What is hydration (1mark)
reacting (ethanol) with steam (h2O)


2b) suggest how
Yeast is removed from ethanol and water and how ethanol is removed from water:
Filter yeast
Distil solution
(2marks)


3) (6 marks) advantages and disadvantages of biodiesel over petroleum diesel from crude oil
(Marks scheme and question in the images....)


4)add one drop of bromine at a time and record how many drops needed to react then repeat twice (3marks)


4b) control concentration of bromine/amount of each drop
(1mark)


4c) conclusions
I said c was the most unsaturated and Viego was 3rd saturated and I thin A was least saturated.
(3marks)


Name the the process of extracting copper from plants (1mark) :
Phytomining


4B) 2 reasons why is copper extracted from the land by this process instead of smelting? (2 marks)
1) Because it is a low grade ore and smelting uses lots is of energy so it would be more profitable phytomining
2) not too sure on the second reason


4C) 2 reasons why is copper extracted using scrap iron to displace copper? (2marks)
1) it is more reactive than copper
2) it is cheap


D) image of electrolysis explain how copper forms (2 marks)
Copper 2+ attracted to negative. 2 electrons at gained to form copper atoms


5) thermal decomposition .... Calcium oxide and carbon dioxide (3marks)


b) average 1.8 (1mark)


c)
the maximum wasn't 2.2 because it didn't fully decompose so co2 wasn't all produced and released/escaped


impurities
(4marks)




6)why did scientist not believe Wegener theory of continent moving ?
He was an astronomer (might not qualify for the mark)
(1mark)


b) how are continents moving (mention X and Y)
Radioactive processes
Heat created
Convection currents in Y( Mantle)
Rise and push X(crust)
(5marks)




Why is carbon dioxide removed?
Because it freezes... This could block pipes. (2mark)


Circle one gas that doesn't condense when cooled to -200 degrees :
Argon OR neon OR nitrogen Or oxygen
I think it is NEON
(1mark)


Which gas is separated with oxygen and why?
Argon because it has similar boiling point to oxygen (3degrees different.)
(2 marks)


7)


What are the conditions of cracking:
Vapour over:
Catalyst (aluminium oxide)
400-700 degrees
(2marks)


Name a method of separation these crude oils
Fractional distillation (1mark)


Draw butene
(1mark)


How is poly(something) formed?
Monomers join together, open bonds to form large molecules (polymers)
(2marks)

Wrong thread.

Seriously. Anyone. Please.

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